We're in for a heat wave, heat and humidity with humidex readings expected to peak in the upper 30s.
Environment Canada has issued a special weather statement to alert people to the risks.
If you work or play outdoors drink plenty of water and take frequent breaks.
Keep an eye out that children don't overdo it.
And keep the family pets in mind, don't overdo the exercising and make sure there is plenty of water availble for them.