Beryl aftermath: Montreal pounded by 100 mm of rain [Video]

A swift and relentless downpour from the remnants of hurricane Beryl brought up to 100 millimetres of rain to the Montreal area in a matter of hours.

“In Montreal, the heavy rain caused numerous sewer backups, flooding under overpasses and the closure of sections of highways,” Environment Canada said.

The city’s airport received 78 millimetres of rain — 30 of which fell in an hour. After the province was pounded by rain, the weather agency’s rainfall warning was still in effect for parts of southern Quebec on Thursday morning.

Meteorologist Jean-Philippe Bégin says the Island of Montreal was hit with up to 80 millimetres, much of which fell within a single hour — a rare event that will be “really hard to break for the next 100 years and more.”

The summer storm led to flash flooding in the Montreal region, where major highways were partially closed during the evening rush-hour traffic Wednesday.

The entrances to the Decarie Expressway were quickly …