UPDATE: Heat warning issued for Sault Ste. Marie

11:30 a.m. update:
Heat warnings previously issued by Environment Canada for northern Ontario have been expanded to include Sault Ste. Marie and St. Joseph Island, as well as Manitoulin Island and areas north of the Sault. Heat and humidity are expected to continue through to Friday when cooler air moves into the region.

Original weather alert:
Heat warning issued for:

• Agawa - Lake Superior Park
• Searchmont - Montreal River Harbour - Batchawana Bay
• White River - Dubreuilville
• Chapleau - Gogama
• Blind River - Thessalon
• Elliot Lake - Ranger Lake
• Greater Sudbury and vicinity
• Espanola - Killarney

Current details:
A heat event is expected to begin today and continue through Friday.

A hot and humid airmass is expected to arrive today. Maximum daytime temperatures of 29 to 31 degrees Celsius are expected, with humidex values 36 to 38. Overnight minimum temperatures will be 17 to 19 degrees Celsius.

A cooler airmass may arrive by Friday night.

Extreme heat can affect everyone’s health.

The health risks are greater for older adults, infants and young children, pregnant people, people with physical and/or mental illnesses, and people with disabilities or mobility issues.

Drink plenty of water regularly, even before you feel thirsty to decrease your risk of dehydration. Thirst is not a good indicator of dehydration.

Never leave people, particularly children, or pets inside a parked vehicle.

Heat warnings are issued when very high temperature or humidity conditions are expected to pose an elevated risk of heat illnesses, such as heat stroke or heat exhaustion.

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.