Heat Wave Causes 42 Visits to ERs in Toronto, Public Health Says

Beaches in Toronto are packed as people find ways to embrace temperatures up to 36 degrees Celsius on June 23, 2025. The Canadian Press/Frank Gunn

Toronto Public Health says a recent heat wave resulted in 42 visits to emergency rooms at local hospitals.

During the heat wave, between June 22 and 24, many parts of southwestern Ontario saw high temperatures and humidity. Toronto set a new temperature record for June 23 with 36 degrees Celsius.