Toronto is under its fifth heat warning this year, outpacing the number of heat events that happened last year, according to a meteorologist with Environment Canada.

Environment Canada has issued a heat warning for eastern Ontario, including Ottawa, advising of hot and humid temperatures early next week.

Toronto is back under a heat warning, with daytime highs climbing to between 30 and 34 C, according to Environment Canada, with humidity making it feel as sticky as 42.