LONDON, ONT. --
Southwestern Ontario is under a heat warning with temperatures expected between 31 and 34 C through Tuesday.
Humidex values are near 40 during the day, with overnight low temperatures forecast to fall to only 21 to 23 C, providing little relief from the heat.
"It is very moist, and it's a very high humidex, and that's why we have heat warnings out for the southwestern part of the province," says Dave Phillips, senior climatologist with Environment Canada.
In London, the perfect way to beat the heat was a run down the 'Bullet' waterslide at East Park.
"Getting out of the house is amazing, and going down the slides is so much fun," says Brianna MacDonald, who was visiting the park Sunday.