Lower Mainland under environmental warning as summer heat ‘peaks’
Posted August 11, 2025 6:55 am.
Last Updated August 11, 2025 1:08 pm.
A heat warning for the Lower Mainland was issued Monday with little relief on the horizon until midweek.
According to Environment Canada, Vancouver, Burnaby, and New Westminster are joining other parts of the province under a warning with forecast temperatures reaching above 30 degrees for most of Metro Vancouver and the Fraser Valley.
CLICK HERE TO LISTEN TO LIVE WEATHER COVERAGE!1130 NewsRadio Meteorologist Michael Kuss says even if you thought Sunday was hot, Monday and Tuesday will feel four to five degrees hotter.
“This is the peak of the heat: the hottest of this three-day run that will last through Tuesday under a huge dome of high pressure; no cloud cover; and not just building temperatures that will peak at 34 to 36 degrees — the humidity’s in there as well, so it could feel as warm as 39 [degrees] for parts of the Lower Mainland,” said Kuss.
He says Monday has the potential to be the hottest day of the summer so far — but it won’t last.
“One more hot day on Tuesday, and then back to closer to seasonal by Wednesday and stretching all the way into the upcoming weekend,” said Kuss.
Environment Canada says there will be some cool air blowing near the water due to strong northwesterly winds over the Strait of Georgia, but the agency is warning to watch for signs of heat stroke.
Those signs include a high body temperature, confusion, dizziness or fainting, and very hot or red skin. Heat stroke is considered a medical emergency.
Seniors and people with diabetes, heart or respiratory disease are particularly vulnerable.
“Check on family, friends and neighbours, who are at higher risk, particularly if they live alone, to make sure they have a cool space,” said Environment Canada.
People showing signs of heat illness should be moved to a cooler environment immediately, and everyone is advised to drink plenty of water.
As well, the agency reminds people not to leave children or pets inside parked vehicles.
1130 News Radio spoke with Suzana Prpic, Senior Manager of Prevention Services at WorkSafeBC, about keeping workers safe during extreme heat.
“It’s always something that every employer needs to keep top of mine because it’s something that can change so quickly,” she said.
She said discussions need to take place at the beginning of every shift to make sure workers are taking precautions including drinking water, wearing light clothing and sunscreen, and scheduling strenuous work for cooler times of the day.
But Prpic said it is also crucial for indoor workplaces to have these conversations.
“It’s an area that requires constant focus,” she said.
Indoor workplaces at most risk include the hospitality industry and the manufacturing industry.
During the heat dome, Prpic said there was a significant rise in workplace heat-related injuries and illnesses, especially indoors.
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—With files from Emma Crawford
