The National Weather Service has upgraded its warning about freezing temperatures tonight.
Yesterday it was a Freeze Watch, now it’s a warning.
Andrew Zimmerman, National Weather Service in Wakefield says those temperatures can kill crops and other sensitive vegetation.
Some farmers in the region have already stacked piles of straw in their fields, and will burn them overnight, hoping the smoke will help keep the cold air off crops, some of which have begun to bloom because of a warm spell in March.
The Warning is out from midnight to nine am.