The heat wave has stretched emergency services, with at least 134 people dying suddenly since Friday in the Vancouver area, according to Canadian police.
The weather service, which has kept records since 1881, is forecasting temperatures above 35 degrees Celsius (95 degrees Fahrenheit) on Thursday and Friday.
Due to change of winds direction from southwest to north or northwest, hot and dry weather will prevail in the port city during next four to five days with maximum temperature likely to remain between 38-40 ºCelsius, said PMD.
It also predicted suspension of the sea breeze in daytime, which will add to further soaring of the temperature in the port city.