Heavy rain tests Edmonton's upgraded stormwater system
City's $1.6B infrastructure investment keeps flooding at bay as 70mm of rain falls in 48 hours. Yellowhead Trail reopens after brief closure.
Two westbound lanes under the CN Rail bridge on Yellowhead Trail reopened Tuesday morning after flooding shut them down the night before. Edmonton's stormwater system held up under the deluge — the city received at least 70 millimetres of rain since Sunday, but officials say the infrastructure is working as designed.
"We are not seeing capacity issues at this time," said Jill Baird, Epcor's water services associate director of communications. The utility fielded more than 85 calls related to ponding and catch basins Monday, but Baird attributed the localized flooding near Yellowhead and 121 Street to exposed soil at a nearby construction site, not system failure.
Mayor Andrew Knack confirmed Tuesday that no failures have occurred in the stormwater network. The city's resilience comes down to a $1.6 billion upgrade approved by council in 2019 to prepare infrastructure for more chaotic weather. Stormwater ponds are temporarily holding excess water and releasing it gradually into the collection system — a normal function during heavy rain.
Alberta Forestry and Parks is projecting the North Saskatchewan River could rise up to two metres and has issued a high streamflow advisory for minor flooding in low-lying areas. Environment Canada ended its yellow rainfall warning but forecasts intermittent rain until next Monday.
Residents are reminded to keep downspouts extended, check sump pumps and backwater valves, and clear eavestroughs and window wells. The system is doing its job — just make sure your home is ready for what comes next.