From Fox News:

Texas Gov. Greg Abbott issued a statewide disaster declaration on Thursday to prevent the potential spread of the New World screwworm fly into the Lone Star State, as he seeks to better protect livestock and wildlife. The New World screwworm fly is spreading north from Mexico toward the border it shares with the U.S.<[scroll for more:]
“Although the New World screwworm fly is not yet present in Texas or the U.S., its northward spread from Mexico toward the U.S. southern border poses a serious threat to Texas’ livestock industry and wildlife,” Abbott said in a statement.