2018 North American heat wave#Eastern Canada

From June 29 to July 6, 2018, the air temperature consistently rose above {{convert|35|°C|°F|1}} in parts of Quebec and Ontario. The humidex value for Ottawa on Canada Day between noon and 3 pm was {{convert|47.0|C|F|1}}, the highest ever recorded in the city.{{cite news |last= Spears|first= Tom |date=3 July 2018|title=Ottawa misses a heat record, but sets a humidex record |url=https://ottawacitizen.com/news/local-news/ottawa-misses-a-heat-record-but-sets-a-humidex-record |work=Ottawa Citizen |access-date=22 July 2018}} The humidex also peaked at {{convert|46.0|C|F|1}} in Toronto and {{convert|45|C|F}} in Montreal. The heat wave also affected the Maritimes, with the humidex value reaching {{convert|35|C|F}} in Halifax and {{convert|45|C|F}} at Greenwood in the Annapolis Valley, on 5 July.{{cite news|last=d'Entremont|first=Danielle|date=5 July 2018|title=How Haligonians are beating the heat|url=http://www.sun-sentinel.com/news/palm-beach/fl-citrus-canker-ruling-20131016,0,7602285.story|work=CBC News|access-date=22 July 2018|archive-date=19 August 2022|archive-url=https://web.archive.org/web/20220819043700/https://www.sun-sentinel.com/|url-status=dead}}

On 4 July, Montreal emergency services reported twelve hundred calls per day about the heat, up 30% from prior busiest days.{{cite news |last= Hajjaji |first= Danya |date=5 July 2018|title=Canadian heat wave kills 12 in Montreal |url=https://www.news.com.au/world/breaking-news/canadian-heat-wave-kills-12-in-montreal/news-story/c7d6899f50cd7edc17837c9d58dd74f4|work=South Florida Sun-sentinel |access-date=22 July 2018}}

As of 10 July, seventy-four people, most of them already ill, had died heat-related deaths in Quebec. This province's death toll is reported as much higher than others' because of its looser rules for attributing death to heat.{{cite news |last= Scotti |first=Monique |date=5 July 2018 |title=Heat-related deaths seem concentrated in Quebec, but there's more to the story|url=https://globalnews.ca/news/4314088/heat-wave-deaths-quebec-ontario/|work=Global Television Network |access-date=2 July 2018}} In Ontario, where only accidental deaths directly caused by heat are counted, the coroner's office is investigating three possible cases.{{cite news |last= Hauen |first=Jack |date=5 July 2018 |title=Highlighting differences with Quebec, Ontario coroner announces investigations of three heat-related deaths|url=https://www.theglobeandmail.com/canada/article-highlighting-differences-with-quebec-ontario-coroner-announces/|work=The Globe and Mail |access-date=2 July 2018}}

While the heat wave ended on 10 July in Central Canada, this was not so for the Maritimes. On the 23rd of July, the interaction between a far-northwest Azores-Bermuda High and a trough over Ontario led to the issuing of heat warnings for all three Maritime Provinces, with several locations reporting humidex values in excess of 36.{{cite news|title = Rain threat builds in Atlantic Canada, but heat goes on |work = The Weather Network |access-date = 26 July 2018 |url=https://www.theweathernetwork.com/news/articles/sticky-steamy-week-head-atlantic-canada-southerly-flow-maritimes-newfoundland-heat-warnings/106970/}} In Halifax, the heat wave contributed to a record-breaking number of hot days in July, with the airport reporting daily high temperatures in excess of 25 °C on twenty-two days that month, breaking the previous record of twenty-one days set in 2008, 2003, and 1924.{{cite news|title=Atlantic Canada's hot summer continues, humidity returns |work = The Weather Network |access-date = 1 August 2018 |url=https://www.theweathernetwork.com/news/articles/atlantic-canada-heat-wave-warnings-humidity-hot-summer-august-long-weekend/107566/}}

On 8 and 9 August, temperatures reached high levels in Metro Vancouver. The daily highs in Abbotsford were {{convert|35.6|°C|°F|1}} and {{convert|34.1|°C|°F|1}} respectively.{{Cite web|url=http://climate.weather.gc.ca/climate_data/daily_data_e.html?hlyRange=2011-10-07%7C2018-04-21&dlyRange=2012-06-21%7C2018-04-21&mlyRange=%7C&StationID=50308&Prov=BC&urlExtension=_e.html&searchType=stnName&optLimit=yearRange&StartYear=1840&EndYear=2018&selRo|title=Abotsford, British Columbia: Daily Data Report for August 2018|website=Historical Climate Data, Government of Canada|language=en|access-date=10 August 2018}} Temperatures on the waterfront of Vancouver reached {{convert|31.0|°C|°F|1}} and {{convert|30.8|°C|°F|1}}. The hottest temperature reached in the Lower Mainland was {{convert|36.5|°C|°F|1}} in Cultus Lake.{{Cite web|url=http://climate.weather.gc.ca/climate_data/daily_data_e.html?hlyRange=2012-06-05%7C2018-08-09&dlyRange=2018-05-14%7C2018-08-08&mlyRange=%7C&StationID=50368&Prov=BC&urlExtension=_e.html&searchType=stnProx&optLimit=specDate&Month=8&Day=9&StartYear=1840&EndYear=2018&Year=2018&selRowPerPage=25&Line=16&txtRadius=100&optProxType=city&selCity=49%7C10%7C122%7C50%7CSurrey&selPark=&txtCentralLatDeg=&txtCentralLatMin=0&txtCentralLatSec=0&txtCentralLongDeg=&txtCentralLongMin=0&txtCentralLongSec=0&timeframe=2|title=Cultus Lake, British Columbia: Daily Data Report for August 2018|website=Historical Climate Data, Government of Canada|language=en|access-date=10 August 2018}} Cranbrook broke its record for August of {{convert|37.2|°C|°F|1}}, and the all-time record of {{convert|38.9|°C|°F|1}}, with temperatures reaching {{convert|40.5|°C|°F|1}}.{{Cite web|url=http://climate.weather.gc.ca/climate_data/daily_data_e.html?StationID=50818|title=Cranbrook, British Columbia: Daily Data Report for August 2018|website=Historical Climate Data, Government of Canada|language=en|access-date=10 August 2018}} Creston broke its August record of {{convert|38.0|°C|°F|1}}, reaching {{convert|38.7|°C|°F|1}}, but did not break the all-time record.{{Cite web|url=http://climate.weather.gc.ca/climate_data/daily_data_e.html?hlyRange=1994-02-01%7C2018-08-10&dlyRange=1993-05-01%7C2018-08-09&mlyRange=1993-01-01%7C2006-10-01&StationID=6838&Prov=BC&urlExtension=_e.html&searchType=stnName&optLimit=yearRange&StartYear=1840&EndYear=2018&selRowPerPage=25&Line=1&searchMethod=contains&Month=8&Day=10&txtStationName=creston&timeframe=2&Year=2018|title=Creston Campbell Scientific, British Columbia: Daily Data Report for August 2018|website=Historical Climate Data, Government of Canada|language=en|access-date=10 August 2018}}

The largest city to break an all-time record was Calgary, with temperatures reaching {{convert|36.7|°C|°F|1}}.{{Cite web|url=http://climate.weather.gc.ca/climate_data/daily_data_e.html?hlyRange=2012-07-09%7C2018-05-12&dlyRange=2012-07-12%7C2018-05-12&mlyRange=%7C&StationID=50430&Prov=AB&urlExtension=_e.html&searchType=stnName&optLimit=specDate&StartYear=1840&EndYear=2018&selRow|title=Calgary, Alberta: Daily Data Report for August 2018|website=Historical Climate Data, Government of Canada|language=en|access-date=10 August 2018}} The previous record for August was {{convert|35.6|°C|°F|1}}, while the all-time record was {{convert|36.1|°C|°F|1}}. Temperatures in Lethbridge reached {{convert|40.5|°C|°F|1}},{{Cite web|url=http://climate.weather.gc.ca/climate_data/daily_data_e.html?StationID=49268&timeframe=2&StartYear=1840&EndYear=2019&Day=25&Year=2018&Month=8#|title=Lethbridge Alberta: Daily Data Report for August 2018|website=Historical Climate Data, Government of Canada|language=en|access-date=26 July 2019}} breaking the previous August record of {{convert|38.9|°C|°F|1}}, and surpassing its all-time record of {{convert|40.0|°C|°F|1}}. Medicine Hat reached {{convert|40.4|°C|°F|1}}, the highest recorded temperature since 1969.{{Cite web|url=http://climate.weather.gc.ca/climate_data/daily_data_e.html?StationID=30347&timeframe=2&StartYear=1840&EndYear=2019&Day=25&Year=2018&Month=8#|title=Medicine Hat RCS Alberta: Daily Data Report for August 2018|website=Historical Climate Data, Government of Canada|language=en|access-date=26 July 2019}}{{cite news |last=Slade |first=Gillian|date=11 August 2018|title=Hat breaks its mark for hottest August 10 ever recorded|url=https://medicinehatnews.com/news/local-news/2018/08/11/hat-breaks-its-mark-for-hottest-august-10-ever-recorded/ |work= Medicine Hat News |access-date=26 July 2019}} Barnwell recorded the highest temperature of {{convert|40.8|°C|°F|1}} during the heat wave on August 10.{{cite news |last=Corriveau |first=Julien|date=13 August 2018|title=Historic Heat Wave Comes to an End|url=http://jjwinnipegweather.blogspot.com/2018/08/historic-heat-wave-comes-to-end.html|work= Winnipeg Weather|access-date=26 July 2019}}

The core heat passed over Saskatchewan on August 10 and 11. Numerous temperature readings above {{convert|40|°C|°F}} were recorded across the province including in Assiniboia and Swift Current, which both recorded 2 consecutive days with high temperatures above {{convert|40|°C|°F}}.{{Cite web|url=http://climate.weather.gc.ca/climate_data/daily_data_e.html?StationID=10805&timeframe=2&StartYear=1840&EndYear=2019&Day=25&Year=2018&Month=8#|title=Assiniboia Airport Saskatchewan: Daily Data Report for August 2018|website=Historical Climate Data, Government of Canada|language=en|access-date=26 July 2019}}{{Cite web|url=http://climate.weather.gc.ca/climate_data/daily_data_e.html?hlyRange=1994-11-29%7C2019-07-25&dlyRange=1959-01-01%7C2019-07-25&mlyRange=1959-01-01%7C2007-11-01&StationID=3157&Prov=SK&urlExtension=_e.html&searchType=stnName&optLimit=yearRange&StartYear=1840&EndYear=2019&selRowPerPage=25&Line=5&searchMethod=contains&Month=8&Day=25&txtStationName=swift+current&timeframe=2&Year=2018|title=Swift Current CDA Saskatchewan: Daily Data Report for August 2018|website=Historical Climate Data, Government of Canada|language=en|access-date=26 July 2019}} This was the first time maximum temperatures greater than {{convert|40|°C|°F}} were recorded since 2003.{{Cite web|url=http://climate.weather.gc.ca/climate_normals/results_1981_2010_e.html?searchType=stnProx&txtRadius=100&selCity=&optProxType=park&selPark=49%7C7%7C107%7C26%7CGrasslands+National+Park&txtCentralLatDeg=&txtCentralLatMin=0&txtCentralLatSec=0&txtCentralLongDeg=&txtCentralLongMin=0&txtCentralLongSec=0&stnID=3162&dispBack=0|title=Canadian Climate Normals 1981-2010 Station Data: Woodrow Saskatchewan|website=Historical Climate Data, Government of Canada|language=en|access-date=26 July 2019}} Numerous monthly records were set including in Moose Jaw, where the temperature reached {{convert|42.3|°C|°F|1}}, and Regina where the maximum temperature was {{convert|41.3|°C|°F|1}}.{{Cite web|url=http://climate.weather.gc.ca/climate_data/daily_data_e.html?StationID=27476&timeframe=2&StartYear=1840&EndYear=2019&Day=25&Year=2018&Month=8#|title=Moose Jaw CS Saskatchewan: Daily Data Report for August 2018|website=Historical Climate Data, Government of Canada|language=en|access-date=26 July 2019}}{{Cite web|url=http://climate.weather.gc.ca/climate_data/daily_data_e.html?StationID=28011&timeframe=2&StartYear=1840&EndYear=2019&Day=25&Year=2018&Month=8#|title=Regina RCS Saskatchewan: Daily Data Report for August 2018|website=Historical Climate Data, Government of Canada|language=en|access-date=26 July 2019}}

Numerous daily records were set across Manitoba on August 11 and 12. High temperatures of {{convert|40.0|°C|°F|1}} were recorded on Manitoba Agriculture weather stations in both Elm Creek and Waskada on August 12.{{Cite web|url=https://www.gov.mb.ca/agriculture/weather/pubs/crop-weather-report-2018-08-12.pdf|title=Manitoba Crop Weather Report|work=Manitoba Agriculture, Government of Manitoba|language=en|access-date=26 July 2019}} These were the first {{convert|40|°C|°F}} readings in Manitoba since 1989.{{Cite web|url=https://climate.weather.gc.ca/climate_data/daily_data_e.html?timeframe=2&Year=1989&Month=8&Day=1&hlyRange=%7C&dlyRange=1948-11-01%7C2008-07-31&mlyRange=1948-01-01%7C2007-11-01&StationID=3572&Prov=MB&urlExtension=_e.html&searchType=stnProv&optLimit=specDate&StartYear=1980&EndYear=1990&selRowPerPage=25&Line=2&lstProvince=MB |title=Altona Manitoba: Daily Data Report for August 1989|website=Historical Climate Data, Government of Canada|language=en|access-date=4 June 2021}} Melita recorded three consecutive days with temperatures above {{convert|35.0|°C|°F|1}} from August 10–12, peaking at {{convert|39.6|°C|°F|1}} on August 12.{{Cite web|url=http://climate.weather.gc.ca/climate_data/daily_data_e.html?StationID=10185&timeframe=2&StartYear=1840&EndYear=2019&Day=25&Year=2018&Month=8#|title=Melita Manitoba: Daily Data Report for August 2018|website=Historical Climate Data, Government of Canada|language=en|access-date=26 July 2019}} On August 12 in Winnipeg, temperatures peaked at {{convert|37.5|°C|°F|1}}, the warmest temperature since 1995, with the humidex reaching {{convert|45.0|C|F}}, the third highest August humidex on record.{{Cite web|url=http://climate.weather.gc.ca/climate_data/daily_data_e.html?StationID=27174&timeframe=2&StartYear=1840&EndYear=2019&Day=25&Year=2018&Month=8#|title=Winnipeg A CS Manitoba: Daily Data Report for August 2018|website=Historical Climate Data, Government of Canada|language=en|access-date=26 July 2019}}

On 6 July, the temperature at UCLA was {{convert|111|°F|°C|1}}, breaking the all-time high temperature record of {{convert|109|°F|°C|1}} set in 1939 but still {{convert|6|F-change}} lower than the record {{convert|117|°F|°C|1}} set in Woodland Hills, a Los Angeles neighborhood, at about 1 p.m. local time the same day, according to the weather service.{{cite news |last=Wolford |first=Ben |date=7 July 2018 |title=Records Broken as Heat Wave Bakes Southern California|url=https://www.news18.com/news/world/records-broken-as-heat-wave-bakes-southern-california-1804293.html|work=News18 |access-date=22 July 2018}} Elsewhere in California, Santa Ana and Ramona hit respective record highs of {{convert|114|°F|°C|1}} and {{convert|117|°F|°C|1}}.{{cite news |last=Arango|first=Tim |date=7 July 2018|title=Record Heat in Southern California, and an Ominous Start to Wildfire Season|url=https://www.nytimes.com/2018/07/07/us/california-wildfires-heat-wave.html|work=The New York Times |access-date=2 July 2018}} The combined conditions of heat and dryness fueled wildfires that caused one fatality and hundreds of evacuations.{{Cite news|url=https://www.cbsnews.com/news/southern-california-heat-wave-breaks-records-in-los-angeles-today-2018-07-06/|title=Southern California heat wave breaks records|date=6 July 2018|work=CBC News |access-date=2018-07-06|language=en}} In Palm Springs the temperature reached {{convert|119|°F|°C|1}}.Accuweather Palm Springs July 2018 temperatures https://www.accuweather.com/en/us/palm-springs-ca/92262/month/331971?monyr=7/01/2018

On 7 July, approximately 34,000 customers of the Los Angeles Department of Water and Power (about 2.5% of its base) experienced power outages, some for up to 24 hours. The previous day, peak energy-demand set a new record for any July day in the city, at 6,256 megawatts.{{Cite news |url=https://abc7.com/weather/socal-heat-wave-leaves-thousands-without-power-across-region/3720377/|last1=Miracle|first1=Veronica|last2= Rand|first2=Jory|title=SoCal heat wave leaves thousands without power across region|date=7 July 2018|work=ABC7 |access-date=22 July 2018|language=en}}{{Cite web|last= Andone|first= Dakin|url=https://www.cnn.com/2018/07/07/us/heat-wave-los-angeles-wxc/index.html|title=Thousands without power in Los Angeles after high demand due to heat wave|date=8 July 2018|access-date=22 July 2018|work=CNN}}

On July 23 Palm Springs' temperature reached {{convert|119|°F|°C|1}} again. On July 24 the temperature hit {{convert|121|°F|°C|1}}, {{not a typo|two degrees Fahrenheit}} less than its all-time record set in July 1995.{{Cite web |last=Marx |first=Jesse |title=Palm Springs hits record-high temps two days in a row |url=https://www.desertsun.com/story/weather/2017/06/25/excessive-heat-warning-issued-palm-springs/426562001/ |access-date=2024-02-28 |website=The Desert Sun |language=en-US}}

California's state authorities and the California Independent System Operator both urged power conservation by people and business from 5 p.m. to 9 p.m. on July 24 and July 25, 2018.{{cite web|url=https://chinapost.nownews.com/20180724-384360|title=California urges power conservation during heat wave - The China Post|website=The China Post}} Flex Alerts were issued as the power grid began to overload. The Los Angeles County Department of Public Health also urged people to stay out of the sun on July 24. Thousands lost electricity in California due to sporadic temporary power cuts on July 24 as record temperatures hit the southwestern United States, including much of Arizona and parts of California and Utah.{{cite web|url=https://chinapost.nownews.com/20180725-384758|title=The Latest: Death Valley temperature expected to hit 124 - The China Post|website=The China Post}}

On July 26, the visitor center at Furnace Creek, California in Death Valley had been over {{convert |111|F|C|1}} since 10:00am and it climbed to {{convert |124.3|F|C|1}} at 4pm local time.{{cite web | url=https://mesowest.utah.edu/cgi-bin/droman/meso_base_dyn.cgi?unit=0&hour1=24&time=LOCAL&past=1&order=1&stn=DEVC1&month1=07&day1=26&year1=2018 |title=Furnace Creek visitor center in Death Valley, CA. July 25, 2018 4pm 124.3 deg F.|website= Meso West |access-date=July 26, 2018}} July 2018 was the warmest July ever in California.[https://www.ncei.noaa.gov/access/monitoring/monthly-report/national/201807 July 2018 National Climate Report], NOAA Death Valley set a global record for average temperature in a month ever at {{convert|108.1|F|C}}.[https://www.wunderground.com/cat6/Death-Valley-Sets-US-Record-Hottest-Month-1080F-Average-Temperature Death Valley Sets Record for Hottest Month: a 108.1°F Average Temperature], Weather Underground, July 31, 2018

The forest fires that started near the Sequoia and Yosemite National Parks on July 13 grew July 22,{{cite web|url=https://eu.usatoday.com/story/news/nation-now/2018/07/22/forest-fires-sequoia-yosemite-national-parks-growing/816302002/|title=Forest fires near Sequoia, Yosemite national parks grow}} 2018. The fires were visible for several miles on the south side of the Mineral King Road and Slapjack Creek, a National Park officials said on July 22. The Atwell-Hockett Trail and the Tar Gap Trail are closed due to the fire, But the Sequoia and Kings Canyon National Parks remain open on July 22. A bulldozer on July 13 and 4 firefighters had died by July 22. More than 2,800 firefighters, a fleet of aircraft and bulldozers had contained only 7% of its perimeter by July 22. An air tanker dropped fire retardant drop on the Horse Creek Fire in Sequoia National Park.

Several fires hit Whiskeytown, California; whilst others expanded past the Sacramento River and into Redding, California on July 28. At least 500 homes, businesses and other structures have been destroyed and 5 died by 28 July.{{cite web|url=https://eu.usatoday.com/story/news/2018/07/28/san-francisco-cop-saves-deer-california-wildfires/855699002/|title=Oh deer! Cop saves fawn from California wildfires}}

About 12,000 firefighters battled to contain wildfires in "erratic" winds across northern California on July 29. 6 Californians and 5 others elsewhere had died by June 29.{{cite web|url=https://elkodaily.com/news/state-and-regional/california-fires-growing-five-dead/article_ae83b30c-1cad-5443-aa8a-f9c424b88b73.html|title=California fires growing; five dead|first1=Jonathan J.|last1=Cooper|last2=Melley|first2=Brian|publisher=Elko Daily Free Press}}

Phoenix, Arizona recorded {{convert|116|F}} on July 24 and 25, 2018Accuweather, Phoenix, AZ July 2018 temperatures https://www.accuweather.com/en/us/phoenix-az/85003/month/346935?monyr=7/01/2018 which was lower than the all-time high of {{convert|122|F}} set on June 26, 1990{{Cite web |date=2017-06-14 |title=Hottest day ever: 122° — and other 'cool' Phoenix-is-really-hot facts |url=https://www.12news.com/article/weather/heat/hottest-day-ever-122-and-other-cool-phoenix-is-really-hot-facts/75-448964915 |access-date=2024-02-28 |website=12news.com |language=en-US}}

Yuma, Arizona recorded {{convert|118|F}} on July 24, and {{convert|117|F}} on July 25.Accuweather, Phoenix, AZ July 2018 temperatures https://www.accuweather.com/en/us/yuma-az/85364/month/326855?monyr=7/01/2018 This passed the previous record high of {{convert|110.8|°F|°C|1}} in 1957.{{Cite web |last= |first= |title=Phoenix & Yuma July 2018 Climate Data |url=https://www.weather.gov/psr/July2018ClimateData |access-date=2024-02-28 |website=www.weather.gov |language=EN-US}}

The temperature in Denver, Colorado, on 28 June, tied the city's record at {{convert|105|°F|°C|1}}.{{cite web|last=Reynolds|first=Dan|url=https://www.cbsnews.com/news/heat-wave-fourth-of-july-weekend-2018-06-29/|date=29 June 2018|title=Dangerous heat wave hitting U.S. over Fourth of July weekend|work= CBC News |access-date=22 July 2018}} The record was set in 1878, then matched in 2005 and 2012.{{cite news |last= Fritz|first=Angel |date=29 June 2018|title=Denver just tied its all-time temperature record. This heat wave is just getting started|url=https://www.washingtonpost.com/news/capital-weather-gang/wp/2018/06/29/denver-just-tied-its-all-time-temperature-record-and-this-heat-wave-is-just-getting-started/ |newspaper= The Washington Post |access-date=22 July 2018}}

The temperature in Shreveport, Louisiana on July 21 was {{convert|106|°F|°C|1}}.Accuweather Shreveport July 2018 temperatures https://www.accuweather.com/en/us/shreveport-la/71101/month/329148?monyr=7/01/2018

The temperature in Las Vegas, Nevada on July 25, 26 and 27 was {{convert|113|°F|°C|1}}; on July 28 it reached {{convert|112|°F|°C|1}}.Accuweather Las Vegas, NV July 2018 temperatures https://www.accuweather.com/en/us/las-vegas-nv/89101/month/329506?monyr=7/01/2018

The temperature in Lawton, Oklahoma on July 19 was {{convert|111|°F|°C|1}}.Accuweather Lawton, KS July 2018 temperatures https://www.accuweather.com/en/us/lawton-ok/73501/month/330125?monyr=7/01/2018

The temperature in Dallas, Texas on July 22 was {{convert|112|°F|°C|1}}.Accuweather Dallas July 2018 temperatures https://www.accuweather.com/en/us/dallas-tx/75202/month/351194?monyr=7/01/2018 The temperature in Wichita Falls on July 19 and July 22 reached {{convert|112|°F|°C|1}}.Accuweather Wichita Falls July 2018 temperatures https://www.accuweather.com/en/us/wichita-falls-tx/76301/month/331133?monyr=7/01/2018

The temperature in St. George, Utah on July 24 and 25 was {{convert|109|°F|°C|1}}; on July 26 it reached {{convert|110|°F|°C|1}}.Accuweather St. George, UT July 2018 temperatures https://www.accuweather.com/en/us/st-george-ut/84770/month/336137?monyr=7/01/2018

By the end of May 2018, Mexico was already one week into the heat wave.{{cite news |last=Suárez |first=Karina |date=31 May 2018|title=El termómetro marcará hasta 50 grados en México|language=es|trans-title=Thermometer to mark up to {{convert|50|°C|°F|1}} in Mexico|url=https://elpais.com/internacional/2018/05/31/mexico/1527793804_651625.html |work=El País |access-date=22 July 2018}} The states of Baja California, Sonora, Nayarit, Jalisco, Oaxaca, Coahuila, Durango, Zacatecas, San Luis Potosi, Querétaro and Morelos registered temperatures between {{convert|40|°C|°F|1}} to {{convert|45|°C|°F|1}}, while Sinaloa, Chihuahua, Michoacán and Hidalgo between {{convert|45|°C|°F|1}} and {{convert|50|°C|°F|1}}. The states of Hidalgo, Chihuahua, Sinaloa, Zacatecas and Jalisco broke historical highs going back more than 50 years.{{Cite web |date=2019-03-07 |title=Heatwave breaks records in several Mexican states - Xinhua {{!}} English.news.cn |url=http://www.xinhuanet.com/english/2018-06/02/c_137224155.htm |access-date=2024-02-28 |archive-url=https://web.archive.org/web/20190307054400/http://www.xinhuanet.com/english/2018-06/02/c_137224155.htm |archive-date=2019-03-07 }} Chihuahua broke its 1978 record temperature and Sinaloa surpassed the high recorded there in 1961. The federal Ministry of the Interior announced that a state of emergency was declared in 573 municipalities in 22 states, and it stated that food and water was being delivered to prevent people from suffering dehydration.

By early June 2018, the Mexican government had declared a state of emergency in more than three hundred municipalities.{{cite news |date=2 June 2018|title=Tres muertos deja ola de calor de hasta 58 grados que derrite a los mexicanos|language=es|trans-title=Heat wave of {{convert|58|°C|°F|1}} leaves three dead, melts Mexicans|url=http://www.laprensa.hn/mundo/1183647-410/tres-muertos-deja-ola-de-calor-de-hasta-58-grados-que-derrite |work=La Prensa |access-date=22 July 2018}} The extraordinary sales of cold beverages, ice creams, pops and other items popular during hot weather increased to such an extent that Canacope Puebla, a Mexico City business chamber, estimated the nation's GDP would increase by approximately 260 million pesos ($13 mln).{{cite news |date=2 June 2018|title=Heat wave causes 3 deaths, economic boost, melting traffic lights|url=https://mexiconewsdaily.com/news/in-coahuila-the-heat-is-melting-the-traffic-signals/ |work=Mexico News Daily|access-date=22 July 2018}}

Peak temperatures in July 2018 included: Hermosillo, Sonora, where on July 23 the temperature reached {{convert|117|°F|°C|1|order=flip}},Accuweather Hermosillo, SON July 2018 temperatures https://www.accuweather.com/en/mx/hermosillo/245727/month/245727?monyr=7/01/2018# and Mexicali, Baja California, where on July 23, 24 and 25 the temperature reached {{convert|115|°F|°C|1|order=flip}}.Accuweather Mexicali, BC July 2018 temperatures https://www.accuweather.com/en/mx/mexicali/241910/month/241910?monyr=7/01/2018

• 2018 heat wave
• Heat Dome

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Category:2018 heat waves

Category:2018 disasters in Canada

Category:July 2018 in the United States

Category:Heat waves in Canada

Category:Heat waves in the United States