Environment Canada has continued a heat warning for inland sections of the North Coast.
The warning, first issued Sunday morning, says a prolonged period of extreme heat is expected to hang around Terrace and Kitimat for a couple of days.
Temperatures exceeding 28 degrees Celsius are in the forecast with overnight lows at or above 13 degrees.
Forecasters say the temperatures should begin to ease by Wednesday.
A heat warning has also been issued for inland sections of the Central Coast as well.
Environment Canada is advising residents to drink plenty of water, stay in a cool place, and never leave people or pets inside parked cars.
Heat warnings are issued when very high temperature or humidity conditions are expected to pose an elevated risk of heat illnesses, like heat stroke or heat exhaustion.