A state of emergency has been declared in Lambton County.
Warden Steve Arnold made the declaration late Monday night.
Police estimate 360 people are still stranded tonight on highway 402 between the London Line overpass, just west of Warwick Village, and Sarnia. The highway has been shut down in both directions from the Blue Water Bridge to Strathroy due to heavy snow and blustery winds for much of the day, meaning most of the stranded motorists have been their for more than 12 hours.
"Police rescuers are experiencing extreme weather challenges in reaching stranded motorists, however (they) remain vigilant in their resolve to get stranded motorists to safety," said OPP Constable Chrystal Jones in a news release sent out late Monday night.
Jones said motorists are encouraged to remain in their vehicles and to consider pooling resources until rescuers can reach them.
She also said motorists should make sure their exhaust pipes are clear of snow so that a clean air supply goes to the interior of the vehicle.