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.
Environment and Climate Change Canada (ECCC) issued a heat warning, saying humid conditions were expected to last until June 25.
Heat-related critical incidents and deaths are not required to be reported to public health in Ontario, according to Toronto Public Health (TPH).
However, it said it recorded 42 heat-related emergency department visits, which were “consistent with the known health risks associated with prolonged exposure to high temperatures.”
Infants, older adults, and those with pre-existing health conditions are particularly vulnerable to health risks, TPH said. It also noted that those who work outdoors or are homeless are at a higher risk.
Common symptoms of heat-related illness include dizziness or fainting, nausea or vomiting, headache, rapid breathing and rapid heartbeat, and extreme thirst, according to the City of Toronto.
Anyone experiencing these symptoms should move to a cooler place and drink water.
Those with signs of heat stroke, which include a high body temperature and showing signs of confusion, are unconscious, or have stopped sweating, should be seen by medical professionals immediately, the city website said.
Temperatures were cooler in Toronto on June 26, but an ECCC forecast predicts temperatures will rise again slightly for the weekend, with June 27 expected to reach up to 26 degrees, June 28 at 27 degrees, and June 29 at 28 degrees. ECCC’s forecast indicates Canada Day in Toronto could reach 30 degrees.
During high temperature periods, Toronto residents have been advised to take precautions during hot weather, which include staying hydrated, finding air-conditioned spaces, checking on others, and seeking emergency care when needed.
It includes libraries and community centres as well as other spaces like shopping malls and YMCAs.
Ottawa also saw a new June 23 heat record set with temperatures reaching 35 degrees Celsius.
The Ottawa Paramedic Service told The Canadian Press it had responded to 14 calls that were heat-related. All but one of those patients were in stable condition.
Paramedics said they found an older man with dementia in a backyard who was suffering from heat stroke. The man was stabilized and taken to hospital in critical condition.
