Humid in Ontario & Quebec - more flooding in Toronto

It remains very hot across the Midwest and upper lakes and extremely humid in Ontario and Quebec. A warm front remains stalled over the region with a very stagnant air mass in place. High dew points and relative humidity readings have lead to widespread dense fog this morning. Both Montreal and Ottawa are reporting less than 0.6 km in fog. Motorists should adjust their speeds until the fog lifts later this morning. It will remain muggy and misty with the risk of showers and thunderstorms this afternoon. Some of the storms could produce heavy rain, especially in southern Ontario.

Lower Simcoe underpass in Toronto last evening. (Jackie Crandles - CP/24)

On Tuesday soaking thunderstorms stretched across central Ontario with flash flooding reported once again in parts of Toronto. The rain and thunderstorms are occurring along the periphery of a very hot air mass that has pushed temperatures to there warmest readings of the summer in Minnesota, Wisconsin, Illinois and Indiana. The heat has spread west into Manitoba and Saskatchewan where both Regina and Winnipeg were 33C (92F) on Tuesday.