Important Environment British Columbia

Southwestern Ontario heat wave: Region primed to cook — yet again

When you factor in the humidity, the federal weather agency says, it could feel as hot as 45 C at its peak.

Southwestern Ontario heat wave: Region primed to cook — yet again
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When you factor in the humidity, the federal weather agency says, it could feel as hot as 45 C at its peak.

Southwestern Ontario heat wave: Region primed to cook — yet again Advisory is expected to be in place until Wednesday night or Thursday morning It’s been really hot so far this summer across southwestern Ontario — and that’s going to continue this week. The Windsor-Essex, Chatham-Kent and Sarnia-Lambton region is under a yellow heat warning that was put in place by Environment Canada. It’s anticipated the alert will be in effect from Monday until either Wednesday night or Thursday morning.

With it comes expected temperatures anywhere from 30 to 37 C, and minimum temperatures of 20 to 24. When you factor in the humidity, the federal weather agency says it could feel as hot as 45 C at its peak. Monday’s forecast is sunshine and highs around 33 — feeling more like 37.

“Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high-risk category,” Environment Canada said. “Take action to protect yourself and others – extreme heat can affect everyone’s health. Determine if you or others around you are at greater risk of heat illness.

Check on older adults, those living alone and other at-risk people in-person or on the phone multiple times a day.” The weather agency says it’s important to watch for early signs of heat exhaustion which could include headache, nausea, dizziness, thirst, dark urine and intense fatigue. “If you, or someone around you, is showing signs of heat stroke which can include red and hot skin, dizziness, nausea, confusion and change in consciousness.

While you wait for medical attention, try to cool the person by moving them to a cool place, removing extra clothing, applying cold water or ice packs around the body.” Drink water often and before you feel thirsty to replace fluids, Environment Canada added, while suggesting people close blinds or shades, and open windows if outside is cooler than inside. “Turn on air conditioning, use a fan, or move to a cooler area of your living space.

If your living space is hot, move to a cool public space such as a cooling centre, community centre, library or shaded park.”

Published
Jul 13, 2026
Updated
Jul 13, 2026
Source
Cbc
Category
Environment
Read time
2 min
Key facts

Key facts

SectionEnvironment
Open
SourceCbc
Open
PublishedJul 13, 2026
UpdatedJul 13, 2026

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PublishedJul 13, 2026, 7:58 AMThis story was published by BC Post.
ImportedJul 13, 2026, 10:15 AMThe item entered the BC Post source pipeline.
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Cbc Published Jul 13, 2026 Imported Jul 13, 2026
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Cbc Jul 13, 2026
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