Boston is in danger of being hit by tornadoes on Wednesday evening as a couple of tornadoes already swept through western and central parts of Massachusetts and killed four people, according to the National Weather Service.

Two people died in Westfield, one in West Springfield and another in Brimfield, according to Massachusetts Gov. Deval Patrick. Springfield city has the population of more than 150,000 people.

Dennis Leger of the Springfield Fire Department told The Weather Channel that hundreds of houses were broken and thousands of trees have fallen down.  The number of injuries is not yet identified.

The city of Springfield is in a state of emergency and 1,000 National Guard Troops were called for emergency response and search and rescue. 

Boston police are trying to keep people out of open spaces, a police spokesperson said.