On Friday the USA was hit by a huge swathe of storms, which led to the deaths of 39 people.
Tornadoes normally strike later in the year. The destruction at the beginning of March, meant the Midwest was still at risk of seeing some wintry weather.
Snow will damage belongings that have been left exposed to the elements and threatens to cause further damage to homes that were affected by the storms. The cold weather will also affect the many people in the region who are still without power.