Here's the latest on how the winter storm is impacting the London, Ont. area

The latest:

• Multiple highway road closures. Details below.
• Most flights into and out of London International airport are cancelled. WestJetsuspendsall flights out of Pearson on Friday saying weather situation across Canada "unlike anything we've experienced."
• School boards across southwesternOntario are closed to students Friday.

The winter storm is underway around London, Ont.,with whiteouts reported outside of city limits and slippery roads making driving conditions difficult across the region.

Environment Canada has warned this weather systemcould impactweekend holiday plans with all emergency officials telling drivers to stay off the road.

Widespread power outages are also possible, Environment Canada said.

• If the power or data on your device is low, get your storm updates onCBC Lite.It's our low-bandwidth, text-only website.

Hydro One, Ontario's largest electricity utility, has said teams are prepared to respond to any outages. Toronto Hydro has reminded customers to refresh their emergency kits and said additional crews are ready to support customers through the weekend.

The city is prepared

Early Friday, snow plows and salt trucks were out with plans to be working around the clock. The city's manager of road operations asked drivers to give plows the right of way, so they can get the job done.

"We have 24 hours after the snow ends to get everything cleared up and we're going to get continued snowfall today and into the evening. So we'll be cleaning this up well into Saturday and likely Sunday," said John Parsons.

Road conditions

Police reported multiple collisions on Highways401 and 402Friday that's shut down major sections of the highway. Rural roads are also closed in some areas.

• Middlesex OPP have responded to a 50- to 60-vehicle pileupon Highway 402 at Kerwood Road.
• Highway 402 wasclosed in both directions between Sarnia and London, according to provincial police.
• Highway 401 was closed in both directions between Tilbury and London.
• Multiple vehicles wereinvolved in a collision at the Highway 401-Highway 402 split, south of London.
• Police closed all roads in Perth County and Huron County.
• Fire crews wereon scene on Highway 401 westbound at Iona Road and Currie Road, where the highway wasclosed fora collision involving multiple tractor trailers and vehicles.
• Highway 4 from Clinton to Teeswater was closed at 12:30 p.m.
• For the latest on OPP road closures and reopenings, visit their Twitter profile here.

Const. Jeffery Hare, OPP West Region spokesperson, advisedall drivers to ensure their lights are turned on and that they have a full tank of fuel, in case they get stopped.

Drivers on the road during the morning commute reported trips typically lasting10 minutes turned into 45-minute trips, with blowing snow and ice. Most people who had been out cautioned others to stay home, if possible.

The London Transit Commission (LTC) is running as usual, with passengers warned to expect delays.

"If conditions deteriorate so the buses are not able to navigate, we'll make the decision to reduce service. The first step would be to not travel on side streets. But we'll be monitoring across the day," said Kelly Paleczny, general manager at the LTC.

Air travel

People with plans to board airplanes out of London won't be going anywhere, as flights out of the city were cancelled. Those to Mexico were still posted to leave Friday morning, with airport officials telling ticket holders to check the flight status.

WestJetcancelled all flights arriving and departing from Toronto's Pearson International Airport on Friday. The cancellations beganat 9 a.m. ETand will last until the end of the day. The airline saida "restart" depends on weather conditions by Saturday.

"The prolonged and extreme weather events that continue to impact multiple regions across Canada are unlike anything we've experienced," said Diederik Pen, WestJet's chief operations officer, said in a statement on Thursday night.

Warming centres open

The London Public Library iswelcoming Londoners to stay warm inside during regular hours of operations.

The following community centres also opened Friday as warming centres.

• Stronach Arenalocated at 1221 Sanford Street(9a.m. to 7:30 p.m.).
• Medway Arenalocated at 119 Sherwood Forest Square(7a.m. to 7 p.m.).
• Earl Nichols Arenalocated at 799 Homeview Road(8a.m. to 10p.m.).