Many consider the Labour Day weekend to be the last days of summer, but the forecast disagrees.
A heat warning that has been in effect for many parts of northern Ontario has now been expanded to Sault Ste. Marie.
Temperatures are forecast to be in the high 20s or low 30s for the next few days with humidex values ranging from 36 to 40 degrees.
Environment Canada expects the hottest temperatures on Monday and Tuesday.
"Overnight lows tonight will likely fall to 14 to 17 degrees Celsius bringing some relief from the heat," the warning stated. "Overnight lows may be several degrees warmer Monday night."
"The passage of a cold front will bring an end to the heat either late Tuesday or Wednesday."
Find Environment Canada's full heat warning below:
Heat warning issued for:
Searchmont - Montreal River Harbour - Batchawana Bay, Ont. (048820)
Sault Ste. Marie - St. Joseph Island, Ont. (048830)
Heat warning continued heat warning for:
White River - Dubreuilville, Ont. (048710)
Greater Sudbury and vicinity, Ont. (049100)
Elliot Lake - Ranger Lake, Ont. (049200)
Chapleau - Gogama, Ont. (049600)
Kirkland Lake - Temiskaming Shores - Temagami, Ont. (049700)
Current details:
A heat event is expected beginning today.
Hazards:
Maximum temperatures of 28 to 32 degrees Celsius.
Humidex values of 36 to 40.
Timing:
Beginning today and possibly lasting into Wednesday.
Discussion:
A hot and humid airmass is expected to affect the area beginning today and possibly persisting into Wednesday. Daytime high temperatures will likely be between 28 and 32 degrees Celsius, with the hottest temperatures most likely on Monday and Tuesday.
Overnight lows tonight will likely fall to 14 to 17 degrees Celsius bringing some relief from the heat. Overnight lows may be several degrees warmer Monday night.
The passage of a cold front will bring an end to the heat either late Tuesday or Wednesday.
Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high risk category.
The risks are greater for young children, pregnant women, older adults, people with chronic illnesses and people working or exercising outdoors.
Watch for the effects of heat illness: swelling, rash, cramps, fainting, heat exhaustion, heat stroke and the worsening of some health conditions.
Drink plenty of water even before you feel thirsty and stay in a cool place.
Check on older family, friends and neighbours. Make sure they are cool and drinking water
Never leave people or pets inside a parked vehicle.
Outdoor workers should take regularly scheduled breaks in a cool place.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to [email protected] or tweet reports using #ONStorm.
More details on the alert are available here.