Environment Canada issues weeklong southern Ontario heat alert (opens in new tab)

Environment Canada issued a heat alert for much of southern Ontario from 8 a.m. Monday, June 29, to 8 p.m. Friday, July 3, warning that “a prolonged period of very hot conditions is expected”. The alert covers a work week that includes Canada Day. The Weather Network forecast Ontario’s first extreme heat event of the summer, with inland humidex values easily reaching the 40s. The heat is tied to a ridge of high pressure and a heat dome over the eastern United States that is expected to extend...