A freeze warning is in effect through 9 a.m. in the Santa Ynez Valley.
According to the National Weather Service, temperatures had the potential to fall between 29 and 32 degrees across portions of the area through mid morning.
Monday’s notice said a freeze “can kill crops and sensitive vegetation, and harm outdoor pets and livestock. Extended exposure to cold can cause hypothermia.”
A freeze warning means temperatures 29 and 32 for two or more consecutive hours are imminent, and protective measures to save crops and sensitive vegetation should be taken.
Officials also urged vulnerable animals and pets should be kept in a house or barn.