Our regular river condition updates will resume here in May 2026.

High-flow season for Calgary’s rivers is mid-May to mid-July every year. This is when there is the greatest risk of river flooding.

Although the 2025 river flood season has ended, you can be assured that we monitor conditions year-round, as there can be risk of drought or flooding outside of this period. It is normal for rain and thunderstorms to cause moderate river levels changes through the summer and fall.

As we continuously monitor conditions, we are always ready to respond if we need to take action. At any time of year, if there is information you need to know, we may communicate the latest updates with you on this webpage, through our Calgary Rivers e-newsletter, and/or through the local media.

Summary of the 2025 high flow season:

• Snowpack was generally lower and melted earlier than average.
• Precipitation was at or below the seasonal average, with the highest amounts in the Upper Elbow and Ghost catchments.
• Flows recorded in Calgary were generally below average but were brought back into the normal range due to the precipitation event on June 19.
• The June 19th event resulted in up to 120 mm of precipitation, resulting in the pro-active lowering of Glenmore and Ghost Reservoirs, and flows remained in normal ranges.

• No impacts at this time.
• We’re continuing to monitor river conditions.
• In preparation for flood season each year, The City completes exercises and testing of infrastructure like river outfalls, lift stations and temporary barrier deployments.

Stay safe near rivers

When the rivers and creeks rise in Calgary, stay away from the banks, including children and pets, as high flows can cause bank erosion and instability. Before going out on the river (rafting, fishing, kayaking), check calgary.ca/watersafety. If there is a boating advisory, stay off the river for your safety.

Direct rainwater away from your home

Eavestroughs and extensions should drain at least 1.5 metres (5 feet) away from your and your neighbours home and onto a landscaped area so the water can soak into the ground.

Help us keep an eye on storm drains

During intense rainfalls, storm drains can be temporarily overwhelmed and it may take some time for water to drain. In some areas of the city, we’ve installed a device in the storm drains to manage how fast water flows into the pipes from the storm drain that helps prevent the system from becoming overwhelmed with stormwater, avoiding water backups into basements or flooding into houses, garages and businesses.

If you see water pooling around storm drains and it hasn’t drained within 90 mins, take a photo and submit it via the 311 app or online request. This will help City crews respond on a priority basis. If safety is a concern or water is entering a building, contact 311 immediately.

Weather and river conditions in Calgary can change quickly and without notice.

• Sign up for alerts.
• For real-time updates and advisories, see Alberta’s current river flow.
• Watch the media and The City’s social media for updates if conditions warrant it.