The temperature in a village in British Columbia's southern Interior reached a scorching 46.1 C Sunday afternoon, marking a new all-time high recorded in Canada.
The reading from Environment Canada in Lytton showed the mercury surpassed the previous record of 45 C set in Saskatchewan in 1937.
A heat warning is in effect for most of Western Canada and the weather agency says numerous daily temperature records have been shattered across B.C.
Some daily highs are forecast to top 40 C, with little reprieve overnight.
Environment Canada expects temperatures to begin cooling on Tuesday.
Sarah Henderson, the scientific director or environmental health at the B.C. Centre for Disease Control is encouraging people to watch for symptoms of overheating.
"If you're out and you're active and you're feeing OK, you're probably OK, but if you're out and you're active and you're beginning to feel too hot and a little woozy, then it's really time to stop and cool down," she said in a phone interview on Sunday.
"If you're finding that you're having symptoms like it's difficult to catch your breath, you're feeling a bit dizzy, you're feeling a bit confused, like you might faint, then you're getting into dangerous territory and you have to cool down right away."
Henderson recommends drinking plenty of water and applying water to the skin while standing in a breeze to help the body cool down without air conditioning.
Heat can build up indoors to the point of becoming unsafe, she noted.
Temperature in #Lytton, B.C., breaks all-time Canadian high set in 1937. #BC
The sweltering heat and cloudless sky didn't deter some Vancouverites from heading to the beach, and many umbrellas dotted crowds that appeared smaller than usual for a sunny day at the popular Kitsilano and Stanley Park beaches.
Others, like Natalie Moser, opted to find shade at their neighbourhood park.
Moser said she would normally stay at a local hotel to enjoy the pool during especially hot weather, but that option was hampered by COVID-19 restrictions and she thought the beach would be too hot, even with an umbrella in hand.
"Today was just really about getting something that was cool," she said.
Eastern Metro Vancouver and the central Fraser Valley remained under an air quality advisory Sunday due to high concentrations of ground-level ozone.
As temperatures climb, BC Hydro said a new record for peak hourly demand during the summer set Saturday could be broken again on Monday.
The Crown utility issued a statement saying preliminary analysis found demand hit 7,972 megawatts Saturday night, up from the previous record of 7,897 set in August last year.
The peak hourly demand is usually recorded on weekdays when customers follow a more routine schedule, it said, making Saturday's record even more striking.
Closing drapes and blinds can block out heat, it said. BC Hydro also suggests opting for smaller appliances when cooking in order to save money and keep cool.
This report by The Canadian Press was first published June 27, 2021.
This story was produced with the financial assistance of the Facebook and Canadian Press News Fellowship.