A severe thunderstorm unleashed unprecedented rainfall on Saturday night, leading to catastrophic flooding along Whitemud Drive in west Edmonton.The storm's intense downpours overwhelmed drainage systems, turning underpasses into lakes and forcing emergency crews to rescue stranded motorists.

Firefighters deployed at the 170 Street underpass after vehicles became trapped in two feet of water, while traffic was redirected due to impassable one-way lanes.Police closed Whitemud Drive between 156 Street and 178 Street, advising drivers to avoid unnecessary travel amid widespread road closures.

Flooding also affected Yellowhead Trail, Jasper Avenue, and 97 Street, with emergency teams responding to stranded vehicles and flooded infrastructure.The storm's ferocity included damaging wind gusts, hail the size of ping pong balls, and a tornado warning issued west of Edmonton.

Authorities urged residents to avoid areas near Commonwealth Stadium and the Expo Centre during the crisis, while non-emergency calls were directed to 780-423-4567 to preserve 911 lines for critical incidents.

The event highlights the vulnerability of urban infrastructure to extreme weather events, underscoring the need for improved flood mitigation strategies in Edmonton.