Environment Canada has issued a yellow-level warning for heat in Toronto and surrounding areas beginning on Monday.
Temperatures are expected to reach a high of 30 to 36 C with humidex values of 38 to 45 C, the national weather agency predicts. The hot and humid forecast is expected to last until Wednesday or Thursday evening.
“Tuesday will mark the peak of this heat event. Maximum temperatures are expected to reach near 36 degrees Celsius in some areas,” reads an Environment Canada notice. “Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high-risk category.”
“Take action to protect yourself and others – extreme heat can affect everyone’s health,” it added.
The heat warning has been issued for Toronto, Pickering, Oshawa, Vaughan, Richmond Hill, Markham, Peel, Halton, Hamilton and Niagara.
“Watch for the early signs of heat exhaustion in yourself and others,” officials added. “Signs may include headache, nausea, dizziness, thirst, dark urine and intense fatigue. Stop your activity and drink water.”
The City of Toronto says its Heat Relief Strategy is in effect. Officials are monitoring conditions around the clock and coordinating public services.
Four mobile water trailers will be available starting at noon on Monday, July 13, offering water fountains and bottle filling stations at:
They will remain at those locations until the heat warning is lifted, except for the mobile water station at Nathan Philips Square, which will remain in place throughout the FIFA World Cup 2026.
Cool spaces at Scarborough, Etobicoke, York and East York Civic Centres will be open from 8 a.m. to 9:30 p.m., as well as Metro Hall.
North York Civic Centre will be open from 7:30 a.m. to 9:30 p.m.
A 24-hour Cool Space will be provided at 136 Spadina Rd. starting at noon on Monday, July 13 and will remain in place throughout the Heat Warning.
More than 170 splash pads will operate daily from 9 a.m. to 9 p.m. and 84 wading pools will be open with various hours.
57 outdoor pools are open 10 a.m. to 8 p.m., with eight pools offering extended operating hours until 11:45 p.m., throughout the heat warning, including:
