A state of emergency has been declared in upstate New York after a massive snowstorm left at least seven dead on Wednesday.

Parts of the city of Buffalo are already under five feet of snow. Around 20 people have died across the United States since Saturday, with weather-related deaths recorded in Michigan and New Hampshire.

New York Governor Andrew Cuomo called the snowstorm a "historic event".

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Snow blows across Route 190 in Buffalo, New YorkReuters
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A vehicle submerged in snow sits on interstate I-190 in West SenecaReuters
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An abandoned car marked by orange cones is buried under snow as a snowplow passes by in BuffaloReuters
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Heavy snow builds up on a vehicle in the driveway of a home in Orchard Park, New YorkReuters
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New York Governor Andrew Cuomo's entourage makes its way on interstate I-190 to survey an area in West SenecaReuters
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A lake-effect snow storm with freezing temperatures produces a wall of snow travelling over Lake Erie into BuffaloReuters
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A single car drives along Route 190 in Buffalo, New YorkReuters
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A woman walks down the middle of the street through the snow in Buffalo, New YorkReuters
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New York Governor Andrew Cuomo climbs over snow piled on the highway after talking with a stranded trucker on interstate I-190Reuters
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A man plows snow off his sidewalk in Buffalo, New YorkReuters