Tillsonburg, Ontario is in the grip of a heat wave to start the week, with Environment Canada issuing a Yellow Heat Warning and forecasting a scorching Tuesday. The warning, in effect as of Monday afternoon, calls for a prolonged stretch of dangerous heat that has also prompted an Extreme Heat Warning from Southwestern Public Health.
Tuesday is expected to be the hottest day, with sunny skies and a high of 35°C. The Environment Canada forecast shows the humidex climbing to 42, while the UV index will hit 10, a very high level. A west wind will pick up through the morning, gusting to 40 km/h.
Health officials are urging residents to take precautions. The heat warning is expected to last until either Wednesday or Thursday evening, with daytime highs between 30 and 37°C and muggy humidex values of 38 to 45. Overnight lows will only dip to 20 to 24°C, offering little relief.
Residents planning to be outdoors early in the week are advised to drink plenty of water, limit time in the sun during peak hours, and watch for signs of heat illness. Heat exhaustion can bring on headache, nausea, dizziness, and intense fatigue. If someone shows signs of heat stroke—red, hot skin, confusion, or a change in consciousness—call 911 immediately.
Some relief is on the way. Starting Wednesday, a mix of sun and cloud moves in, along with a 30 percent chance of showers each day through Friday; Saturday will be cloudy with a 30 percent chance of showers. Wednesday’s high will still reach 32°C, but Thursday will dip to 29°C, a slight cooldown that should make outdoor activities more comfortable.
