Thermometer showing temperature of over 30 degrees Celsius

Heat and humidity expected through Friday night

July 4, 2019

Temperatures are teetering on the brink of an official heat warning. Whether we reach that threshold or not, please remember to take precautions and have a plan for the summer’s hot and humid weather.

What could be in that plan?

  • How you’ll stay hydrated (fluids and a water bottle)
  • Knowing where you can stop for an air-conditioned rest (or inviting others to your home to cool off, if you have air conditioning)
  • Planning to do outdoor activities earlier in the morning or later in the evening, when it’s not so hot
  • Remembering to check on children, the elderly, and those with chronic health conditions (they’re most at-risk for heat-related illness)
  • Finding an alternative for your pet - never leave pets or people in the car or in direct sunlight
  • Having sunscreen on hand so you can apply regularly

What is a heat warning?

Environment Canada issues a heat warning when the forecast shows at least two days in a row with daytime highs above 31°C accompanied by nighttime lows above 20°C, or when the forecast shows at least two days in a row with a humidex over 40°C.

For more information about protecting yourself from extreme heat, visit our Extreme Heat page.