Toronto is sweltering under a record-breaking heat wave, with temperatures reaching a scorching 36°C on Monday — the city’s hottest day in nearly a decade. Factoring in humidity, it felt more like 46°C, triggering widespread health warnings, power outages, and school disruptions across the region.
According to Environment Canada, the previous record for June 23 stood at 32.8°C, set back in 1983. Monday’s reading not only shattered that mark but also became the city’s highest temperature since July 13, 2016.
Public Health Response
Toronto Public Health issued a stern warning, urging residents to stay hydrated, avoid direct sun exposure, and check in on vulnerable individuals — especially infants, seniors, and those with health conditions.
“Extreme heat can cause serious health risks, including heat stroke, which can be fatal,” officials warned.
Mayor Olivia Chow apologized for the closure of some public pools on Sunday, vowing that it “cannot happen again.” As of Monday, 15 city pools were operating from 10 a.m. to 8 p.m.
Premier Doug Ford criticized the closures, calling them a “poor excuse” during such extreme weather. “They should have the pools open,” he said.
Infrastructure Strained
Power Outages
More than 2,700 Toronto Hydro customers lost power Monday afternoon due to a failure at Hydro One’s Bridgman Transmission Station. Power was fully restored by late afternoon.
TTC Disruptions
The Summerhill subway station was temporarily closed due to electrical issues linked to the outage.
School Closures
Six French-language schools under the Viamonde School Board were closed due to the lack of air conditioning.
The Toronto District School Board (TDSB) kept schools open but warned parents about “uncomfortable conditions” in non-air-conditioned buildings. Every school was advised to utilize designated “cooling centres” like gyms or libraries.
Heat-Related Safety Measures
- Crossing guards were absent in Oakville, with police urging extra caution in school zones.
- No changes to operations at Pearson Airport were reported, but extreme temperatures are expected to strain air travel and transit systems through Tuesday.
- Tuesday’s forecast shows continued heat, with temperatures expected to reach 33°C.
As Toronto endures this intense wave of summer heat, city officials stress that vigilance and preparation are key. Residents are advised to limit outdoor activities during peak hours, stay hydrated, and seek shade or air-conditioned spaces whenever possible.
This is the second day of a multi-day heat wave, and with the climate pattern holding steady, authorities warn that more records could fall before temperatures ease later in the week.