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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Scene Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Calgary’s position at the confluence of the Bow and Elbow Rivers makes it vulnerable to flash floods, especially after heavy rain or rapid snowmelt in late spring and early summer. Travellers should check Canada Weather Warnings and the city’s flood map before heading out; avoid low-lying roads and river pathways during storms. The 2013 flood remains the benchmark for extreme events, but smaller floods can occur suddenly.
When is flooding most likely in Calgary?
Flooding in Calgary typically occurs between May and July, when intense rain combines with melting snow from the Rockies. Chinook winds can also trigger quick thaws that swell rivers. The best time for worry‑free travel is August through September, when rainfall decreases and river levels drop.
What should visitors know about Calgary flood risk today?
Even when no active warning is posted, be aware that underpasses, Nose Creek, and low‑lying downtown areas can flood within minutes during a downpour. If you see a calgary flash flood today alert, stay off roads and never drive through standing water. For the most current conditions, check Weather Alert page and the City of Calgary’s real‑time gauge data.
Is Calgary prone to flooding?
Yes. The city sits where two rivers meet, and urban development has increased runoff. Floods can happen quickly after heavy rain or rapid snowmelt, particularly in spring and early summer.
What was the 2013 Calgary flood?
In June 2013, extreme rainfall and mountain snowmelt caused the Bow and Elbow Rivers to overflow, forcing 100,000 evacuations and causing $5 billion in damage. It is the worst flood in modern Calgary history.
How can I check flooding in Calgary today?
Visit Environment Canada’s weather alerts, the City of Calgary’s calgary flood map, and our Canada weather hub for warnings. Avoid relying on single sources during fast‑changing storms.