From the National Weather Service:
HARD FREEZE WARNING IN EFFECT TONIGHT FOR THE FIRST HARD FREEZE
OF THE SEASON...
* WHAT...Sub-freezing temperatures as low as 22 expected.
* WHERE...Ector, Midland, Glasscock, Crane, Upton, Reagan and
* WHEN...From 10 PM this evening to 10 AM CDT Thursday.
* IMPACTS...Frost and freeze conditions will kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.