5:08 AM EDT Sunday 01 July 2018
Heat Warning in effect for:
- London - Parkhill - Eastern Middlesex County
- Strathroy - Komoka - Western Middlesex County
Extreme heat event for the Canada Day long weekend.
On Canada Day, daytime highs are forecast to reach the mid thirties with humidex values into the mid forties. Daytime highs in the low thirties are expected to persist through most of next week. Overnight low temperatures are expected to be in the low to mid twenties, except high teens in some rural areas, providing little or no relief from the heat.
This will be the most significant heat event in the past few years.
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.
Watch for the effects of heat illness: swelling, rash, cramps, fainting, heat exhaustion, heat stroke and the worsening of some health conditions.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to
ONstorm@canada.ca or tweet reports using #ONStorm.