Environment Canada has issued a heat warning for Toronto and surrounding areas, with scorching temperatures and oppressive humidity expected to blanket the region starting Sunday afternoon and persist into early next week.
Daytime highs across the Greater Toronto Area are forecast to reach between 31°C and 36°C, with humidex values potentially pushing perceived temperatures as high as 45°C. Overnight lows between 21°C and 25°C will offer little overnight relief.
The warning covers Toronto, Mississauga, Brampton, Vaughan, Richmond Hill, Markham, Durham Region, Halton Hills, Milton, Barrie, and parts of York and Simcoe counties. Environment Canada advises residents to prepare for prolonged heat that may extend through Tuesday night, and possibly into Wednesday depending on the arrival of a cold front.
“This is extreme heat. I’m urging all residents to stay cool, drink lots of water, and look after each other,” said Toronto Mayor Olivia Chow at a press conference on Saturday.
Symptoms of heat-related illness, including heat stroke — a medical emergency — include red, hot skin, nausea, confusion, dizziness, and altered consciousness. Environment Canada recommends moving those affected to a cooler area, removing excess clothing, and applying cold water or ice packs while awaiting medical attention.
To help residents cope, the City of Toronto has extended hours at its 58 outdoor pools, open from 10 a.m. to 8 p.m. daily, with several staying open until 11:45 p.m., including Alex Duff Pool, Giovanni Caboto Pool, and Sunnyside Park. Splash pads will run daily from 9 a.m. to 9 p.m., and select wading pools will open from noon to 5 p.m.
More than 500 “cool spaces,” such as libraries, community centres, and shaded parks, are available citywide. A complete list can be found on the city’s website.
People most at risk — including seniors, young children, and those living alone or without adequate housing — are encouraged to stay hydrated, avoid strenuous outdoor activity during peak hours, and check in regularly on vulnerable neighbours or family members.
The city also announced enhanced outreach efforts to support unhoused residents, including distributing 14,000 water bottles via outreach teams and providing shelter referrals. Three mobile water trailers — “HTO To Go” stations — will offer free tap water at Nathan Phillips Square, Trinity Bellwoods Park, and Sankofa Square on Sunday.
Residents are reminded to keep blinds closed, open windows only when the outdoor temperature is cooler, wear light, loose-fitting clothing, and schedule outdoor activity during the early morning or late evening hours.
With temperatures expected to remain dangerously high for several days, public health officials urge vigilance and community support to ensure the safety of all residents during this early summer heat wave.