Heat warning issued as season’s first major heat event moves into southern Ontario

(Source: Environment Canada)

Environment Canada has issued a heat warning for parts of southern Ontario as the first major heat event of the season moves into the region.

Forecasters say daytime highs are expected to reach near 30 degrees Celsius beginning Monday afternoon, with humidex values climbing to around 36. Overnight lows are expected to remain between 18 and 20 degrees Celsius.

The warning is expected to remain in effect until Tuesday night.

Environment Canada is urging residents to take precautions, noting that extreme heat can affect anyone’s health, particularly older adults, people living alone and those at higher risk of heat-related illness.

Officials say residents should watch for symptoms of heat exhaustion, including headache, nausea, dizziness, thirst, dark urine and fatigue. Heat stroke symptoms can include confusion, loss of consciousness, red or hot skin and nausea.

Residents are encouraged to drink water regularly, avoid prolonged sun exposure and schedule outdoor activities during cooler parts of the day.

Environment Canada is also reminding people never to leave children or pets inside parked vehicles.

Public health officials advise those without air conditioning to seek cooler public spaces such as libraries, community centres or cooling centres if needed.