The first step in understanding your flood risk is knowing how you may be impacted by flooding. Flooding in Calgary can occur in several ways:
- Rivers and streams cannot contain excess rainfall inside their banks
- Rain and snowmelt cannot be absorbed into the ground
- Waterways or storm drains are blocked with debris or ice
- Stormwater or sewage pipes are overloaded or break, causing backup
- Severe thunderstorms cause localized flooding of streets and property
- Ice jams on rivers may cause elevated water levels and overland flooding
Assessing your risk and preparing for flooding
Flooding can occur at any time in Calgary with little or no warning. The period between May 15 and July 15 is when we are most likely to experience flooding because historically this is when we receive our largest rainfalls.
It is not possible to completely eliminate the risk of flooding, and people who live in low-lying areas may be impacted especially from river flooding.
To determine if you live in a community that may potentially be impacted by river flooding, please review our flood inundation maps, as well as our river flows, triggers and effects information.
In order to best assess your risk for potential flooding please reference the following:
You can also stay informed on current river flow rates by downloading Alberta Environment's river monitoring app for iTunes and Android.
Roles and responsibilities for flooding - private property
The City of Calgary does not protect private property from flooding. We do encourage property owners to assess and understand the risk of flooding in their area.
Property owners are also responsible for taking measures to protect their own property from hazards.
City of Calgary Flood Mitigation Measures Assessment Project
In 2014, we started a project to perform a triple bottom line analysis on the most effective combination of flood mitigation investments and actions. Community feedback on how to best address flood mitigation will be an important part of the process. For more information, visit the Flood Mitigation Measures Assessment project page.