Environment Canada has issued extreme heat warnings for multiple provinces across Canada, including Ontario, Quebec, Manitoba, and the Northwest Territories.The heat event is expected to peak on Tuesday, with temperatures in southwestern Ontario reaching up to 37°C and humidex values exceeding 40.Parts of Quebec may see daytime temperatures near 30°C, while northern Manitoba could experience highs of 29°C.

The agency is urging Canadians to monitor for signs of heat exhaustion, such as headache, nausea, dizziness, and intense fatigue, and to take immediate action by stopping activity and hydrating.The warnings highlight the prolonged nature of the heat event, which spans multiple days with no overnight relief.

Health officials emphasize the importance of staying hydrated, avoiding strenuous activities during peak heat hours, and checking on vulnerable individuals.

The extreme weather conditions pose significant risks, particularly for those in high-risk groups, and the alerts serve as a critical public health measure to mitigate potential heat-related illnesses.