Almost 100 vehicles were involved in a snow squall-related pileup Thursday morning near Barrie, Ontario.
Three people were taken to the hospital, and Ontario Provincial Police told CTV News Barrie that Highway 400 would be closed most of the day as a result of the crash.
The crash occurred about 9 a.m. Thursday.
A snow squall, associated with the passage of an arctic cold front, moved through the area at the time of the crash, AccuWeather.com Canadian Weather Expert Brett Anderson said.
Visibility quickly dropped to less than 0.2 km (one-eighth of a mile) within a matter of minutes.
"It was like driving into a wall of white," Anderson said.
Temperatures were about -13 C (9 F) at the time of the squall with wind gusts up to 65 kph (40 mph).
"AccuWeather RealFeel® temperatures were about -25 to -35 C (-13 to -31 F). It was very cold," Anderson said.
The major pile-up punctuated a very busy day for provincial police.
OPP-stranded motorists urged to stay inside vehicle with 4-ways on. OPP are responding to many calls. Expect delays, We are responding.— OPP West (@OPP_WR) February 27, 2014