Yellow Warning – Heat Warning In Effect For: Chatham-Kent – Rondeau Park from Environment Canada.
Impact Level: Moderate
Forecast Confidence: High
The first heat event of the season will begin this afternoon and is expected to continue into Tuesday for: Chatham-Kent – Rondeau Park.
What: Daytime highs of 30 to 32 degrees Celsius. Humidex values of 36 to 38. Overnight lows near 20 degrees Celsius.
When: Beginning this afternoon and continuing into Tuesday. Ending Tuesday night.
Additional Information:
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.
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.
For more information: How to protect yourself from the health effects of extreme heat Health risks and who is at risk of extreme heat events Please continue to monitor alerts and forecasts issued by Environment Canada.
Suggestions from Chatham-Kent Public Health:
Ways to help prevent heat-related illness:
- Drink plenty of fluids, especially water.
- Never leave people or pets in a parked car.
- Seek cooler or air-conditioned spaces.
- If you are taking medication or have a health condition, ask your health care provider or pharmacist if heat increases your health risk. Be sure to follow their recommendations.
- Check on elderly family members and neighbors daily to make sure they are keeping cool.
- Wear lightweight, loose-fitting clothing.
- Take cool showers or baths, or use cool, wet towels on your face, neck or arms.
- The use of a fan alone may not provide enough relief from the heat.
- Avoid strenuous activities between 10 a.m. and 4 p.m. when the sun is hottest.
- Avoid going out in the sun, if possible. If you are outdoors, wear sunscreen.
- Avoid heavy meals and using your oven.
- Keep curtains closed to block sun during the day.
Municipal Centres and Libraries will be available as cooling spaces for residents seeking relief from the heat when they re-open on Tuesday May 19, 2026.
- For a list of available centres and their hours of operation, please visit: https://www.chatham-kent.ca/services/Pages/Contact-Us.aspx.
- For a list of Library locations and their hours of operation, please visit: https://www.chatham-kent.ca/library/usingthelibrary/branches/Pages/Branch-Information.aspx
Homeless persons, and/or those lacking shelter, water, or food are particularly vulnerable to the impacts of extreme heat. Anyone experiencing homelessness should call the Homeless Response Line at 519.354.6628 (24/7) for support.