Vancouver Police say a car travelling eastbound on the Georgia Viaduct lost control just before 5 p.m.
The car rolled over and caused extensive damage to power lines.
Police say emergency crews are attending to the male driver and the extent of his injuries are not immediately known.
Drivers are facing long delays on the viaduct, an overpass that links Strathcona with downtown Vancouver.
BC Hydro says nearly 2,000 customers are without power in surrounding neighbourhoods, including Gastown, Chinatown and the Downtown Eastside.
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