Water overfilling a street

Flooding is the most costly natural hazard in Ontario and it can happen at any time of year.

Floods are typically caused by melting snow, ice jams, high lake levels, and heavy rains and thunderstorms. They can happen at any time of year and in urban and rural areas. Flash flooding can occur in rain storms or when a storm drain is plugged – often with little or no warning.

For more information on floods, visit: https://www.ontario.ca/page/floods#before 

For flood forecasting and current flood warnings, visit: