Alberta is expected to be hit by burning-high temperatures on Tuesday, going up to the mid-thirties, as record breaking heat travels through British Columbia and parts of the United States.
Dozens of daily temperature records fell Monday across Alberta, British Columbia, Saskatchewan and Northwest Territories, CBC reports.
A combination of high temperatures, maintenance of generators, a transformer unexpectedly going out of service and low wind energy generation resulted in the need for load shedding, said Epcor.
"Flood-impacted areas and critical facilities such as hospitals and emergency services will not be affected by this directive," said Epcor in a press release.
Environment Canada issued a humidex advisory for much of central and southern Alberta and people have been advised to stay in air conditioned places and seek shade whenever possible.
The humidex advisory is expected to end by Tuesday evening, when a cold front is expected to sweep through the province.
Wednesday will still feel like the mid-30s but there will be slightly less humidity in the air, CBC meteorologist Johanna Wagstaffe reports.
The Alberta Electric System Operator (AESO) issued a public appeal to Albertans to reduce power use on Tuesday as extreme heat increased demand.
AESO said wind generation of energy was very low and it was also importing electricity from B.C. and Saskatchewan to meet demand.
Edmonton, Calgary, Red Deer and Lethbridge were also hit by rolling blackouts for the first time since 2006 on Monday, because of a heavy load on the power grid, CBC reports.
Edmonton's Office of Emergency Management warned people to drink lots of water, keep to the shade and use sunscreen and hats.
A severe thunderstorm watch was also issued for parts of central and southern Alberta including Airdrie, Cold Lake, Calgary, Edmonton, Fort McMurray, Fort Saskatchewan and Whitecourt.
The extreme heat arrives just a week after flood waters caused unprecedented destruction in parts of southern Alberta.
Many took to Twitter to vent their frustration with the heat, while some preferred it over the snow.
Find some of the reactions below:
With files from The Canadian Press