Video shows impact of snow storm in Iowa ahead of caucus

Residents in Iowa face blizzard warnings, three days ahead of the first electoral event in the country.

A massive winter storm is developing in the US and has been predicted to bring dangerously cold temperatures and severe weather across the weekend. The National Weather Service has issued weather alerts in nearly every state.

Wind chills up to -45F (-42C) are forecast in Iowa, where voters are preparing to participate in the state's caucuses on Monday.