© REUTERSPeople sleep at a cooling shelter set up during an unprecedented heat wave in Portland, Oregon
A "heat dome" over western Canada and the US Pacific northwest sent temperatures soaring to new highs, triggering heat warnings from Oregon to Canada's Arctic territories on Sunday.
Hotspot Lytton in British Columbia -- about 250 kilometres (155 miles) northeast of Vancouver -- broke the record "for
Canada's all time maximum high" with a temperature of 46.6 degrees Celsius (116 Fahrenheit), said Environment Canada.
More than 40 new temperature highs were recorded throughout the province over the weekend, including in the ski resort town of Whistler. And the high-pressure ridge trapping warm air in the region is expected to continue breaking more records throughout the week.
Environment Canada issued alerts for British Columbia, Alberta, and parts of Saskatchewan, Yukon and the Northwest Territories.
"A prolonged, dangerous, and historic
heat wave will persist through this week," it said, forecasting temperatures near 40 degrees Celsius (104 Fahrenheit) in several regions, or 10-15 degrees Celsius hotter than normal.
Comment: A record amount of snow and ice was added yesterday in Greenland - 4 gigatons in one day