A severe thunderstorm watch is in effect across Chatham-Kent.
Environment Canada officials say severe thunderstorms may develop late this afternoon or this evening and end late this evening.
The main threats are wind gusts up to 90 km/h and heavy downpours.
Damaging hail is also possible.
Heavy downpours can cause flash floods and water pooling on roads.
Lightning kills and injures Canadians every year.
The Office of the Fire Marshal and Emergency Management recommends that you take cover immediately if threatening weather approaches.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to firstname.lastname@example.org or tweet reports using #ONStorm.