Public health is warning residents to prepare for a stretch of dangerously hot and humid weather.
Environment Canada is forecasting daytime highs reaching up to 33°C on Friday, with humidex values pushing the perceived temperature to 41. Overnight lows between 19°C and 23°C will offer little relief, creating conditions that meet the threshold for a heat warning and potentially an extended heat warning through Monday. Tuesday is also expected to be hot, with highs near 31°C, except in Haliburton.
The health unit says the alerts are meant to help prevent heat-related illnesses and guide community responses to protect vulnerable populations.
A heat warning is issued when high daytime temperatures and warm overnight lows persist for two days. If the hot weather continues for three or more days, an extended heat warning is issued.
“Extreme heat can pose serious health risks, particularly for the elderly, people experiencing homelessness, outdoor workers, children, and people with certain health conditions,” the health unit said in its advisory.
Officials are urging residents to take precautions: Stay hydrated, avoid strenuous outdoor activity, and check on vulnerable neighbours and family members. Public outreach is also being directed toward priority populations.
Heat-related illnesses such as heat exhaustion, dehydration, and heat stroke can escalate quickly and require immediate attention.
