Environment Canada warns of extreme heat in Ottawa-Gatineau and eastern Ontario, with temperatures expected to feel like 42°C starting Sunday.
Multi-Day Heat Event Begins Sunday
Environment Canada has issued heat warnings for Ottawa-Gatineau and a wide area of eastern Ontario, forecasting a prolonged period of extreme temperatures starting Sunday. The advisory, released Saturday afternoon, includes regions from Prince Edward County to Pembroke and eastward to Cornwall and the Quebec border.
Temperatures to Feel Like 42°C
Daytime highs in Ottawa are expected to hover between 30°C and 34°C, with humidity pushing the perceived temperature to as high as 42°C. Overnight lows will remain warm, ranging from 19°C to 23°C. Monday is expected to be the hottest day, with the heat possibly persisting into Wednesday in some areas.
Previous Records Set in Late June
The upcoming heat wave follows a similar event in late June, when cities across the region—including Ottawa, Gatineau, Kemptville, and Trenton—recorded daily temperature records. Environment Canada’s preliminary data highlighted an alarming trend of increasingly intense summer heat.
Health Officials Urge Precaution
Health Canada is urging residents to take precautions during the heat wave. Recommendations include staying hydrated, avoiding strenuous outdoor activities during peak hours, preparing meals without ovens, and identifying nearby air-conditioned locations.
Warning Signs of Heat Illness
Canadians are advised to watch for symptoms of heat exhaustion, such as headaches, dizziness, nausea, or rapid heartbeat. More serious signs like confusion or flushed, hot skin may indicate heat stroke—a medical emergency requiring immediate attention. In such cases, calling 911 is advised.
Local Resources Available
Municipalities are also mobilizing to support residents. In Ottawa, a publicly accessible map identifies cooling centres and other spaces where residents can escape the heat. Residents are encouraged to check their local government websites for similar resources.
With extreme heat gripping the region once again, officials stress the importance of preparedness and vigilance. As the climate trend continues, staying informed and taking preventive steps could save lives during this prolonged heat event.
