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Alerts for: Metro Montréal - Laval


3:44 PM EDT Monday 06 July 2020
Heat Warning in effect for:

  • Châteauguay - La Prairie area
  • Laval area
  • Longueuil - Varennes area
  • Montréal Island area

An extreme heat wave is expected this week.

A warm and humid air mass over Southern Quebec will persist over the next few days. Beginning Tuesday, temperatures will exceed the 30-degree mark during the day and shouldn't drop below 20 degrees at night. Temperatures combined with humidity will give humidex values of 40.

These conditions may persist until Friday.

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.

Check on older family, friends and neighbours. Make sure they are cool and drinking water

Never leave people or pets inside a parked vehicle.

Watch for the symptoms of heat illness: dizziness/fainting; nausea/vomiting; rapid breathing and heartbeat; extreme thirst; decreased urination with unusually dark urine.

Outdoor workers should take regularly scheduled breaks in a cool place.

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 #QCStorm.


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