Active AlertsJohnsons Siding, ON

Heat Warning
Issued at Thu 7:29 PM Jun. 1
Issued by: Environment and Climate Change Canada
Recommended Action

Drink plenty of water even before you feel thirsty and stay in a cool place.

Never leave people or pets inside a parked vehicle.


Multi-day heat event continues.

Maximum temperatures:
29 to 32 degrees Celsius.

Minimum temperatures:
16 to 18 degrees Celsius.

Ending this evening or Friday evening.

The heat event is expected to end this evening for areas southwest of James Bay and Friday evening for remaining areas.


Extreme heat affects everyone.

The risks are greater for young children, pregnant women, older adults, people with chronic illnesses and people working or exercising outdoors.

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 or tweet reports using #ONStorm.