A severe thunderstorm watch has been issued for parts of the Greater Toronto Area on Wednesday.
A line of severe thunderstorms is expected to move across the GTA, Environment and Climate Change Canada said in the alert.
Thunderstorms are moving southeastward from the Orangeville and Grand Valley area. Storms are also expected to move across Aurora, Newmarket and the Port Perry area. The main hazard is torrential rainfall, Environment Canada said.
Hail up to quarter size and wind gusts up to 90 km/h are possible in this area.
Storms will move from Stewart Hall to Orono, then to Oshawa Harbour, Environment Canada said.
These severe thunderstorms are moving east at 50 km/h.
Strong wind gusts, up to quarter-size hail and heavy rain are possible.
Locations and nearby areas that could be impacted include: Oshawa, Courtice, Bowmanville, Orono, Port Darlington, Newcastle Village, Bewdley and Cobourg.
Heavy rain, from 30 to 50 millimetres of rain in less than an hour, with low visibility is the main hazard on Wednesday morning.
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Heavy rain may cause flash flooding and “significant reductions to visibility,” Environment Canada said.
Environment Canada suggests people take immediate cover if a thunderstorm approaches.
“If outside, protect yourself from flying debris and hail,” Environment Canada said. “Don’t drive through flooded roadways.”
Emergency Management Ontario recommends that you take cover immediately if threatening weather approaches.
Toronto, Mississauga and Halton Region are not part of the alert, but thunderstorms are expected late Wednesday afternoon. Up to 30 millimetres of rain is expected. There is also a risk of a thunderstorm overnight.
A heat warning remains in effect for southwestern Ontario and Niagara Region. Maximum temperatures of 30 to 32 C and minimum temperatures of 20 to 23 C are expected. Maximum humidex values will be near 40 C.
The heat may last into Thursday for extreme southwestern Ontario.
Parts of the Greater Toronto Area, including Durham Region, are under a thunderstorm alert on Wednesday. Fog and heat alerts were issued for other areas of Ontario. Map: Environment Canada
Lead photo: Raychel Sanner
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