Environment Canada says a heat wave descending on parts of Ontario this week is expected to bring dangerously high temperatures. People cool off along the Humber River in Toronto on Monday, May 29, 2023. THE CANADIAN PRESS/Nathan Denette
A heat wave descending on parts of Ontario this week is expected to bring dangerously high temperatures and humidex values, Environment Canada warns.
The weather agency issued a heat warning starting Monday for an area that spans London to Ottawa, stretching up to Sault Ste. Marie and as far north as Fort Albany.
Temperatures in the Greater Toronto Area and Ottawa could feel as hot as 45 C with the humidity. Regions further north are also forecast to see humidex values that could feel like the low to mid 40s, Environment Canada said.
The high temperatures are made twice as likely due to ongoing effects of climate change, Climate Central, a U.S.-based non-profit group of scientists and communicators, wrote in a statement.
Meanwhile, the province’s Independent Electricity System Operator said Monday there will be enough electricity supply to meet the additional demand created by the heat wave.
Environment Canada said the hot air will move eastward later in the week, and has issued a special weather statement starting Wednesday for much of southern Quebec.
The agency is also forecasting a period of “very hot” and humid weather across most of New Brunswick beginning Tuesday, with temperatures that could reach 33 C and humidex values of about 40 C.
It said the health risks associated with heat illness are greater for older adults, infants and young children and other vulnerable groups.
Hot, humid air can also worsen air quality, Environment Canada warned.
This report by The Canadian Press was first published June 17, 2024.
