Heat Alert

• Environment Canada issues heat warning for southern Ontario starting Thursday

  Environment Canada issues heat warning for southern Ontario with temps up to 35 °C, humidex near 44. Little relief expected overnight; residents urged to stay cool.

  Weather

  Jul 23, 2025
  
• Heat warning for southern Ontario, Quebec set to end tonight

  Southern Ontario is facing another heat wave with temperatures near 35°C and humidex values hitting 40, prompting warnings and expanded cooling measures in Toronto.

  Weather

  Jul 6, 2025
  
• Advertisement
• Hamilton declares heat warning

  The warning means that the city and participating community agencies will offer cool places to go during the heat event. Open swims at city rec centres will also be free of charge.

  Weather

  Sep 2, 2023
• Advertisement
• Heat warnings in place for much of B.C. Central Interior, parts of North

  The Fraser Canyon and Okanagan appear set to face the worst of the heat, with daytime highs forecast near 35 C and overnight lows holding near 18 C through Sunday.

  Weather

  Jul 7, 2023
• Heat warning issued for Hamilton with highs of 30 C expected over two days

  Both Environment Canada and Hamilton's medical officer of health issued heart warnings Wednesday with maximum daytime temperatures around 30 C until late Friday afternoon.

  Weather

  May 31, 2023
• Heat warning extended for Hamilton, Niagara Region with humidex in the upper 30s expected

  Hamilton's medical officer of health is alerting residents that the heat experienced on Saturday and Sunday will carry over into Monday.

  Weather

  Aug 8, 2022
• London and Middlesex, Ont. under 2-day heat alert

  The health unit says forecast calls for temperatures to climb to a high of 30 C on Saturday, with humidex values reaching 40 C.

  Weather

  Aug 6, 2022
• Heat warning issued for Hamilton, Niagara Region with humidex in the upper 30s expected

  Both Environment Canada and Hamilton's medical officer of health have issued heart warnings for the weekend with maximum daytime temperatures in the high 20s expected.

  Weather

  Aug 5, 2022
• Advertisement
• MLHU issues 5th heat alert of season for London region

  Environment Canada is showing the mercury is expected to climb to a high of 32 C under very muggy conditions, with humidex values reaching 43.

  Weather

  Aug 2, 2022
• Advertisement
• B.C. ready to use new warnings as heat wave approaches, minister says

  Mike Farnworth said Friday the province had learned from last year's deadly heat dome and has implemented new protocols to issue heat alerts as a heat wave is expected to hit B.C.

  Weather

  Jul 22, 2022