Toronto is looking at a week of withering hot weather under a warning for all southern Ontario of humid weather expected to settle on the region. “A hot and humid air mass from the Gulf of Mexico will affect most of southern Ontario from Tuesday through Thursday,” an Environment Canada notice says. Most of southern Ontario could see highs between 30 C and 33 C from Tuesday to Thursday, with overnight lows of 20 to 23 C. But the whole week with the exception of Friday will be very hot. Some showers are expected Thursday.
