All of Southern Ontario is under the heat warning.
Environment Canada calls it an Extreme Heat Event, and as a result, authorities are urging everyone to take precautions even suggesting staying indoors during the peak heat of the day.
With school and the sun being out, local parks are getting crowded.
With the temperature expected to feel like 40-plus degrees until Monday, heat health is a top priority.
The Ticats switched up their game day policy, allowing fans to bring in their own bottles of water to the game to make sure they stay cool during the game.
The Blue Jays, who have a Canada Day series against the Tigers, including two midday games this weekend have their own sun-health checklist.
Lengthy exposure to the heat can cause heat exhaustion which leaves people either confused, dizzy or lightheaded, sweating profusely, nauseous and can even cramp up.
Left unattended, heat stroke can strike.
Symptoms include severe headache, dehydration, sweating stops, causing your skin to get wet, hot and dry.
While everyone could get either of these illnesses, seniors living alone are at the greatest risk.
While it could be tough to stay away from the sunny conditions, the city recommends staying inside between 11am and 3pm.
Information on Cooling Stations can be found on local city websites below.
