The Middlesex-London Health Unit (MLHU) has issued a heat alert on Monday for the region.
Environment Canada is calling for an expected high of 31 C and a humidex value of 35 in London and the surrounding area.
Health officials are urging people to take the necessary precautions when spending time outdoors.
“Many people across the region are enjoying holidays this week and their planned activities may include spending time outdoors taking part in fun summer activities. Some of the important things to add to those plans are a hat, light clothing and of course plenty of water to drink,” said Randy Walker, a public health inspector with the MLHU.
“It is vitally important to build those things into your summer fun plans, and that also includes using sunscreen and taking frequent breaks from the heat and cooling off in an air-conditioned space or even taking a cool bath.”
In addition, health officials are advising people to never leave a child or pet in a parked car, refrain from falling asleep outside under direct sunlight, avoid drinking alcoholic beverages, as well as coffee, avoid intense or moderately intense physical activity and to refrain from spending too much time outdoors.
According to the City of London website, a cooling centre is available at the South London Community Centre, 1119 Jalna Boulevard, from 11 a.m. to 7 p.m. during a heat alert.
Officials expect the alert to only be in effect Monday as overnight temperatures are forecast to fall to 17 C and showers are expected on Tuesday.
The health unit is also recommending people continue to follow public health guidelines to curb the spread of COVID-19, including wearing a mask or face covering, maintaining six-feet of physical distance from others and washing your hands frequently.