Feels Like 45°C: Widespread Heat Warnings Grip Canada

By Tahani Elghazaly
Published July 14, 2026

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Large parts of Canada are facing dangerously hot and humid conditions on Tuesday, July 14, 2026, as an intense heat wave reaches its peak in Ontario and warnings remain in effect across parts of Quebec, Manitoba and the Northwest Territories.

Environment and Climate Change Canada said daytime temperatures in parts of Ontario could climb close to 37°C, while high humidity may push Humidex values to between 38 and 45. The extreme conditions are expected to place additional pressure on residents, public services and outdoor workers during one of the hottest days of the current heat event.

Southern Ontario is expected to experience some of the most severe conditions, including communities across the Greater Toronto Area, southwestern Ontario and parts of eastern Ontario. Overnight temperatures may remain above 20°C in several areas, limiting the opportunity for homes and the human body to cool down.

Toronto and surrounding communities are also facing oppressive humidity, with the temperature feeling significantly hotter than the official reading. The heat may continue into Wednesday in some areas and could last longer near parts of Lakes Ontario and Erie.

Heat warnings also cover sections of Quebec, where daytime temperatures are expected to reach around 30°C to 33°C, while Humidex values may approach 40. Conditions are forecast to begin easing gradually in some areas overnight and into Wednesday.

In northern Manitoba and parts of the Northwest Territories, residents are also being warned about unusually high daytime and overnight temperatures. The prolonged heat is particularly concerning in communities where homes may not have air conditioning or easy access to cooling centres.

The situation is being complicated in parts of Ontario and Quebec by wildfire smoke, which may reduce air quality and visibility. Health officials advise residents to prioritize staying cool when extreme heat and smoke occur at the same time, while limiting strenuous outdoor activity.

Symptoms of heat exhaustion may include headaches, nausea, dizziness, weakness, extreme thirst and unusually dark urine. Anyone experiencing these symptoms should move to a cooler place, rest and drink water.

Confusion, fainting, loss of consciousness or very hot skin may indicate heat stroke, which is a medical emergency. Residents are advised to call 911 immediately if someone shows serious symptoms.

Authorities are urging Canadians to drink water regularly before feeling thirsty, avoid demanding outdoor activities during the hottest hours and close curtains or blinds to reduce indoor heat. People without adequate cooling are encouraged to visit libraries, community centres, shopping malls or designated cooling locations.

Children, older adults, pregnant people, individuals with chronic health conditions, outdoor workers and people living alone face a higher risk of heat-related illness. Residents are also reminded never to leave children, older adults or pets inside parked vehicles, even for a short period.

The heat is expected to ease gradually in some regions beginning Tuesday night and Wednesday, but elevated temperatures may persist for several more days in parts of the Great Lakes region and northern Canada. Residents are encouraged to continue monitoring local weather alerts and public health guidance.