Rain continued to fall Monday morning after heavy thunderstorms pounded Toronto and the GTA overnight.

Pools of water disrupted the morning commute with crews dispatched to clear roads.

More than a month’s worth of rain fell in Markham by 8 a.m., with 84 mm falling, according to unofficial reports from Environment Canada.

Windsor had 47 mm while only 10 mm had fallen on Toronto Island.

A section of Highway 404 and Steeles Avenue was flooded Sunday night.

Environment Canada confirmed that an EF1 tornado touched down in the Grand Bend area. The agency says the tornado had peak winds between 155 and 175 kilometres per hour. The track of the damage of the tornado was 500 metres at its widest and the length of the damage was estimated to be about five kilometres.

Pictures were posted to social media of a funnel cloud near Millbank, and heavy damage in Grand Bend, with damage to hydro polls and large trees being knocked over.

Environment Canada lifted a severe thunderstorm warning for the area around 11 p.m. During the height of the warning, hail battered Brampton, Markham and Unionville.