Public health officials have issued a heat warning for Ottawa.
Heat warnings are issued when temperatures are expected to feel like 40 C with the humidex, which is expected to last the next two days.
Health officials recommend residents do six things to deal with the heat:
Drink plenty of water.
Avoid heavy outdoor activity.
Wear a hat, light and loose clothing, sunscreen and sunglasses when going outside.
Spend at least two hours in an air-conditioned room.
Talk with your doctor, nurse or pharmacist if you are taking medications, some medicines make it harder for your body to control its temperature.
Stay connected with people in your community who have a difficult time coping with hot weather and those who live alone, check on them regularly.
CBC Ottawa climatologist Ian Black is following the hot and humid weather. Monday's high was expected to hit 34 C with a "very high" UV index at nine.
Tuesday's high is also expected to reach 34 C.