Forecasters are urging Alabama residents to protect water pipes and plants ahead of freezing temperatures expected overnight.

The National Weather Service in Birmingham issued a freeze warning for central Alabama from 9 p.m. Monday to 9 a.m. Tuesday. Temperatures could drop as low as 28 degrees.

Cold, post-frontal air moves into the region tonight. Overnight temperatures are forecast to drop into the mid 20s north to lower 30s south. A Freeze Warning will be in effect from 9 PM tonight through 9 AM tomorrow morning. #alwx pic.twitter.com/Kyso1QDEad

— NWS Birmingham (@NWSBirmingham) November 22, 2021

The weather service says outdoor water pipes should be wrapped, drained or allowed to drip slowly to prevent them from freezing and possibly bursting. In-ground sprinkler systems should be drained.

The low temperatures will also be a threat to plants.