http://www.bbc.co.uk/news/world-us-canada-25499753
23 December 2013 Last updated at 12:53 ET 
Snow and ice are causing severe disruption to parts of Canada and the US
Related Stories
Ice storm hits Canada Watch
Residents of Toronto face a Christmas without electricity after a severe ice storm enveloped Canada’s biggest city on Sunday.
About 219,000 city dwellers were without power as of Monday afternoon, Toronto Hydro reported.
The power firm said it expected most restorations to be done by Thursday, but that some residents may not have electricity until the weekend.
The city has opened several warming centres across Toronto.
Temperatures as low as -15C (5F) are expected over the next few days.
At least 11 deaths have been blamed on the storm system in Canada and parts of the US, which were also affected.
‘Truly catastrophic’
An estimated 10-30 mm of ice built up on trees and other surfaces in the greater Toronto area during the storm.
Sheets of ice fell from buildings and off moving vehicles, Canadian TV channel CBC said.
At the scene 
Alix Kroeger BBC News
Torontonians are used to snow, but an ice storm is something different – and dangerous. Virtually every tree branch and twig is encased in ice. Many streets are blocked by fallen branches and festooned with yellow safety tape where live power lines have come down.
Trams are running again, now overhead cables have been cleared of ice, but subway services are disrupted. Flights in Toronto, Ottawa and Montreal have been delayed, if not cancelled altogether, at one of the busiest times of the year. Pedestrians are walking mainly in the road, avoiding pavements as slippery as skating rinks. On main roads traffic is moving, albeit with delays where traffic lights are not working because of power cuts.
The utility Toronto Hydro says it could be up to 72 hours before electricity is fully restored – well after Christmas Day. The city has opened warming centres for those without power, but many face a cold, dark and disrupted Christmas.
Via Rail warned customers travelling between Toronto and Montreal, Ottawa and New York to expect delays on Monday.
Toronto Mayor Rob Ford resisted declaring a state of emergency, but said getting electricity to hospitals and community housing should be a priority.
Global Climate Change http://courses.dce.harvard.edu/~envre130
Environmental Justice http://courses.dce.harvard.edu/~envre145
Environment Ethics http://courses.dce.harvard.edu/~envre120
Transition Studies 