Environment Canada has issued a heat warning for the Barrie area ahead of the Victoria Day long weekend, with humidex values forecast to reach 36. The warning, which takes effect on Saturday, May 17, 2026, advises residents to take precautions against the extreme heat.
Heat Warning Details
The humidex, which combines temperature and humidity, is expected to soar to 36 degrees Celsius on Sunday and Monday. Daytime highs are predicted to be in the low 30s, with overnight lows remaining near 20 degrees, offering little relief. The warning covers Simcoe County and surrounding regions.
Health Risks and Precautions
Health officials warn that the combination of heat and humidity can lead to heat exhaustion or heatstroke, especially for young children, older adults, and those with chronic illnesses. Residents are urged to stay hydrated, avoid strenuous outdoor activities during peak heat hours, and check on vulnerable neighbours. Cooling centres may be opened in some municipalities.
Victoria Day Activities Affected
The heat warning may impact traditional Victoria Day celebrations, including fireworks displays, parades, and outdoor gatherings. Organizers are advised to provide shade and water stations. Beachgoers and boaters should also be cautious, as water temperatures remain cool, posing a risk of hypothermia despite the hot air.
Regional Impact
Other parts of Ontario, including Toronto and Ottawa, are also expected to experience high temperatures, though Barrie is forecast to be among the hottest spots. The heat wave is expected to break by Tuesday as a cold front moves through.
