Environment Canada and the City of Hamilton’s medical officer of health have issued a heat warning for Hamilton. Extreme high temperatures expected to begin today, and may continue into Tuesday.
The warning from Environment Canada says that daytime maximum temperatures are expected to be near 30 C, with humidex values near 40.
The weather agency adds that “there will be little relief at night” as minimum temperatures are expected to be near 20 C. It also says hot and humid air can also bring deteriorating air quality, and can result in the Air Quality Health Index approaching the high risk category.
A cooler air mass is expected to arrive Tuesday night, the agency says.
The city and participating community agencies are responding to the heat by offering “cool places” to go during all stages of a heat event. These locations can be identified by a “Cool Down Here” sign at the entrance.
As part of the city’s heat response plan, regularly scheduled Open Swims at all municipal indoor and outdoor pools will be free of charge.
The city had previously issued a heat warning which was in effect July 8 to 10. Such warnings stay in effect until they are cancelled or escalated to an extended heat warning.
What to watch for during heat events
During heat events, people are advised to watch for the effects of heat-related illness.
Signs of heat exhaustion include heavy sweating, weakness, cold, pale and clammy skin, weak pulse, fainting and vomiting. If you’re experiencing those symptoms, seek help right away and call 911 if needed, the city says.
The office of the medical officer of health says people can reduce their risk of heat-related illness by following the following precautions:
- Drink plenty of water. Avoid drinking alcoholic and caffeinated beverages on hot days.
- Go to an air-conditioned place. Visit a designated cool place listed on the city’s website.
- Dress to protect from the heat. Wear lightweight, loose-fitting, light-coloured clothing. Wear a hat or take an umbrella to keep your head cool and don’t forget sunscreen.
- Take it easy. Limit physical activities (walking, running, gardening, etc.) during the day. If rescheduling activities to dawn or dusk when it may be cooler, protect yourself with insect repellant as mosquitoes are more active at such times. Check labels to apply.
- Cool off. Take a cool bath or shower.
- Keep your living space cool. Close your blinds or curtains. Open windows to let air circulate when using a fan.
- Never leave children or pets alone in closed vehicles. Temperatures in a car can become life threatening within minutes.
- Check on your neighbours and family.
- Landlords can help to decrease the risk of heat-related illness for tenants. Connect with tenants to determine if units have adequate cooling. If not, provide tenants with onsite access to a cool space accessible throughout the heat warning, such as a common room with air conditioning.