Many Canadians are in for a sweltering day on Tuesday, with Environment Canada issuing extreme heat warnings for multiple provinces. Heat warnings now cover most of Ontario along with parts of Quebec, Manitoba and the Northwest Territories, meaning millions of Canadians are going to be impacted as the temperatures soar. Global News Chief Meteorologist Anthony Farnell is here with a cross-country forecast, and tells us all what we can expect from a punishing heat wave.