Heat Warning Issued for York Region

July 13, 2026

Environment and Climate Change Canada have issued a Yellow-level Heat Warning on Sunday, July 12, 2026, that is expected to last until at least Wednesday, July 15, 2026.

York Region Public Health is advising residents to take extra precautions to stay safe in the heat. High temperatures, high humidity, lack of shade and minimal air movement can cause heat-related illnesses, ranging from minor heat rashes and muscle cramps to hot weather emergencies like heat stroke and heat exhaustion.

Warning signs of heat-related illness include dizziness, headache, nausea or vomiting, weakness and confusion. If you experience any of these symptoms, seek immediate medical attention.

Everyone is at risk, especially older adults, infants, young children, people who work or exercise outdoors and those with certain medical conditions.

Remember to check on friends, family and neighbours who may be at risk.

Find ways to stay cool

  • Stay indoors in cool, well-ventilated areas
  • Wear lightweight, light-coloured, loose-fitting clothing and a wide-brimmed hat
  • If you do not have air conditioning, go to cool places within your community, such as local libraries, community centres, public pools and shopping malls
  • Never leave people or pets inside a parked vehicle or in direct sunlight
  • Check the Cooling Spaces App for more information on the locations and opening times of cool spaces in York Region

Drink extra fluids

  • Increase your fluid intake regardless of your activity level
  • Drink plenty of water before feeling thirsty

Reduce physical activity, especially in the full sun

  • Reschedule or plan outdoor activities during cooler parts of the day, such as early in the morning or later in the evening
  • Reduce sun exposure between 11 a.m. and 4 p.m. and when the UV Index is reported to reach three (moderate) or higher
  • If you must be outdoors in the heat, rest frequently to allow your body temperature to cool down
  • Avoid sun exposure by wearing a wide-brimmed, breathable hat or use an umbrella
  • Wear sunscreen with SPF of 30 or higher

For more information on extreme heat and how to stay cool, please visit york.ca/ExtremeHeat, follow York Region on X and Facebook, or contact York Region Health Connection at 1-800-361-5653 or dial 711 with a TTY device.