The National Weather Service in Indianapolis has issued a freeze warning from midnight tonight to 9 a.m. Thursday morning for central and southern Indiana.
Sub-freezing temperatures of down to 27 degrees are expected. You can expect frost and freeze conditions that will kill crops and other sensitive vegetation and possibly damage unprotected outdoor plumbing.
The agency suggests that to prevent damage to outdoor water pipes, they should be wrapped, drained, or allowed to drip slowly. If you have in-ground sprinkler systems, you should drain them and cover any above-ground pipes to keep them from freezing.