AKIPRESS.COM - Thirty-three people have died in a heat wave that has baked the southern part of the Canadian province of Quebec, officials say, BBC reports.

The sweltering weather began last Friday with temperatures hitting 35C (95F) and high humidity.

The death toll has climbed every day this week, with most of the victims between the ages of 50 to 80.

The heat wave is the worst the province has seen in decades, officials say.

Officials are urging people to drink plenty of water and stay in the shade.

My thoughts are with the loved ones of those who have died in Quebec during this heat wave. The record temperatures are expected to continue in central & eastern Canada, so make sure you know how to protect yourself & your family: https://t.co/JSPPsU80x9

— Justin Trudeau (@JustinTrudeau) July 4, 2018

"We're doing everything we can," said Montreal Mayor Valerie Plante.

The city has opened pools and air conditioned spaces to the public.

Mayor Plante said first responders have been going door-to-door, checking on some 15,000 vulnerable residents.

So far, 18 of the 33 deaths have been in Montreal, the most populous city in the province, with other deaths in surrounding regions.