Environment Canada meteorologists were tracking a cluster of severe thunderstorms in the Greater Golden Horseshoe region on Tuesday night, prompting them to issue warnings for several areas.
At 7 p.m., the cluster was located from Hespeler to Norval and was nearly stationary, the national weather agency said.
As a result, a severe thunderstorm warning was in effect for Halton Hills and Milton.
Environment Canada said heavy rainfall with local amounts of 50 to 75 millimetres was possible. The warning has been lifted.
Earlier, parts of York Region were also under a severe thunderstorm warning, but the advisory has since been lifted.
There are no weather alerts for Toronto.
