Understanding Flood Messages

What if a flood message is issued for your area?

  1. Take heed of the message issued
  2. Be prepared to follow the instructions of emergency response officials

Monitoring weather and flood conditions is a shared responsibility of Conservation Authorities, Ministry of Natural Resources and Forestry (MNRF) and Environment Canada. The MNRF Surface Water Monitoring Centre monitors weather forecasts and water levels across the province and provides that information to Conservation Authorities. 

Conservation Authorities and MNRF are responsible for forecasting where and when flooding is likely to occur, and issuing appropriate messages. 

When flooding is possible or imminent, Conservation Authorities (or MNRF, in areas where there is no Conservation Authority) issue flood messages to municipal emergency management officials and the media. The municipal officials then take action to warn local residents. Advance warning of an impending flood allows municipalities and other government agencies to put emergency response plans into action, and if necessary, evacuate communities.


Where can you find out if there is a flood warning in your area

Flood messages are found on the MNRF's website and on the homepage of Conservation Authorities’ websites. In some watersheds, members of the public can receive flood messages by email and social media.Or, you can use this interactive map to find your Conservation Authority's website and flood message updates.

Flood Messages

Conditions are within normal limits. No flooding is expected.

High flows, unsafe banks, melting ice or other factors could be dangerous for recreational users such as anglers, canoeists, hikers, children, pets, etc. Flooding is not expected.

Early notice of the potential for flooding based on weather forecasts calling for heavy rain, snow melt, high wind or other conditions that could lead to high runoff, cause ice jams, lakeshore flooding or erosion.

Flooding is possible in specific watercourses or municipalities. Municipalities, emergency services and individual landowners in flood-prone areas should prepare.

Flooding is imminent or already occurring in specific watercourses or municipalities. Municipalities and individuals should take action to deal with flood conditions. This may include road closures and evacuations.