Heat warning issued for Windsor-Essex and Chatham-Kent

Yellow heat warning in southwestern Ontario on June 9, 2026. (Source: Environment Canada)

Environment Canada has issued a yellow heat warning for Windsor-Essex and Chatham-Kent.

The forecaster says the heat event is expected to begin on Wednesday. Daytime highs are expected near 31 degrees Celsius. Overnight lows near 21 C. Humidex values between 36 and 40.

The heat is expected to last into Thursday. It may continue Friday into Saturday, although Environment Canada says confidence is low at this stage.

Areas near Lake Huron and Lake Erie will likely be cooler.

Tips to protect yourself and others from the heat

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.

Watch for the early signs of heat exhaustion in yourself and others.

Signs may include headache, nausea, dizziness, thirst, dark urine and intense fatigue. Stop your activity and drink water.

Heat stroke is a medical emergency. Call 9-1-1 or your emergency health provider 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.

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.

Follow the advice of your region’s public health authority. Plan and schedule outdoor activities during the coolest parts of the day. Limit direct exposure to the sun and heat. Wear lightweight, light-coloured, loose-fitting clothing and a wide-brimmed hat.

Never leave people, especially children, or pets inside a parked vehicle. Check the vehicle before locking to make sure no one is left behind.