Yellow Level Heat Warning issued beginning Tuesday, June 30 to Friday, July 3

- Jun 30, 2026

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Dangerously hot, humid conditions are expected from Tuesday, June 30, to Friday, July 3, and possibly into Saturday.

The hottest days are expected to be Wednesday and Thursday, with maximum temperatures potentially reaching 34 degrees Celsius. Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high-risk category.

Anyone can get sick from extreme heat, but some people are more at risk. People at greater risk include infants and young children, older adults, pregnant people, people living with chronic health conditions including mental illnesses. People who live alone, don’t have access to cooled indoor spaces or work or exercise in the heat (indoors or outdoors) are also at higher risk.

When outdoor temperatures are hot, indoor temperatures can rise even higher. Indoor temperatures of
26°C or higher are dangerous to health, especially for people more sensitive to heat.

For more information about extreme heat, visit smdhu.org/heat.

Residents can monitor local weather conditions using the WeatherCAN app.

Pay close attention to how you and those around you feel. Know the signs and symptoms of heat illnesses and what to do if they occur. Remember, heat stroke is a medical emergency! If you are caring for someone who has a high body temperature, is unconscious or confused, has stopped sweating, and/or feels dizzy/faints, call 911 immediately. Check the weather forecast and alerts to stay informed. If you take medication or have a health condition, ask your health care provider if it increases your risk from extreme heat or dehydration.

Drink plenty of water before you feel thirsty. Cool off by taking a cool shower or bath, going for a swim, putting your feet in water or applying a damp towel to your skin. If you have air conditioning, turn it on; even on low, it can help you stay safe. Keep the heat out. During the day, shut windows and doors (if indoor temperatures are comfortable) and close blinds, curtains, or awnings. Open doors and windows when it is cooler outside. Use a fan to circulate air during cooler parts of the day

Spend time in a cool or air-conditioned place, such as a cooling centre or go to a cooler public space like a library, shopping mall, or splash pad.

Check in on neighbours, friends and family, especially those at greater risk, to make sure they are cool and hydrated. High temperatures and humid air can increase air pollution levels. Check the Air Quality Health Index (AQHI) for your location. Extreme heat is usually more dangerous than short-term exposure to poor air quality, so you should prioritize staying cool if you must choose.

Local cooling and hydration centres

Residents can access the library in Severn to cool down and access water:

Severn Township Public Library, 31 Coldwater Road, Coldwater
- Hours:
  - Tuesday, June 30: 10:00 a.m. to 5:00 p.m.
  - Wednesday, July 1: Closed for Canada Day
  - Thursday, July 2: 10:00 a.m. to 5:00 p.m.
  - Friday, July 3: 10:00 a.m. to 5:00 p.m.
  - Saturday, July 4: 10:00 a.m. to 4:00 p.m.

A water refill station is available in the Coldwater Community Centre (11 Michael Anne Drive) between the hours of 8:00 a.m. to 10:00 p.m. from Tuesday, June 30, to Saturday, July 4.

The City of Orillia also welcomes Severn residents in need of relief to:

Orillia Public Library, 36 Mississaga Street West
- Hours:
  - Tuesday, June 30: 10:00 a.m. to 8:00 p.m.
  - Wednesday, July 1: Closed for Canada Day
  - Thursday, July 2: 10:00 a.m. to 8:00 p.m.
  - Friday, July 3: 10:00 a.m. to 6:00 p.m.
  - Saturday, July 4: 9:00 a.m. to 5:00 p.m.
Orillia Recreation Centre, 255 West Street South
- Hours:
  - Tuesday, June 30: 5:30 a.m. to 9:00 p.m.
  - Wednesday, July 1: 7:00 a.m. to 2:00 p.m. (reduced hours for Canada Day)
  - Thursday, July 2: 5:30 a.m. to 9:00 p.m.
  - Friday, July 3: 5:30 a.m. to 8:30 p.m.
  - Saturday, July 4: 7:00 a.m. to 6:00 p.m.

Orillia's Splash Pads will also be open daily. Visit the City of Orillia website for more information on their beach and splash pad locations.

Contact information

Please contact the Simcoe Muskoka District Health Unit Health Connections for more information. You can also phone 705-721-7520 or 1-877-721-7520.