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Environment Canada issues heat alert July 26-28, 2023

From Environment Canada

Heat warning issued for:
   Niagara, Ont. (046700)

Current details: 
Hot and humid conditions expected Wednesday July 26th through Friday July 28th.

Temperatures on Wednesday are expected to reach 30 degrees Celsius. Thursday, while slightly cooler, will be very humid with humidex values in the upper thirties. Friday is expected to be extremely hot with humidex values reaching 40 for many areas. Minimum temperatures in the low twenties will provide little relief from the heat. Cooler temperatures are expected Saturday.

  • Areas near the lakes can expect to remain cooler than areas inland.
  • Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high risk category.
  • Watch for the effects of heat illness: swelling, rash, cramps, fainting, heat exhaustion, heat stroke and the worsening of some health conditions.
  • Drink plenty of water even before you feel thirsty and stay in a cool place.
  • Check on older family, friends and neighbours. Make sure they are cool and drinking water
  • Never leave people or pets inside a parked vehicle.
  • Outdoor workers should take regularly scheduled breaks in a cool place.


Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or tweet reports using #ONStorm.

More details on the alert are available here.