...and, surprising no one, he's getting sued:

Sheriff Sued After Threatening Wanted Criminals with Arrest if They Sought Hurricane Shelter

I think the plaintiff - Andres Borreno - said it perfectly: "Criminal suspicion is not raised by trying to enter an emergency shelter to save one’s life and the life of family members," which measn that simply wishing to enter a storm shelter, to protect your life, and the lives of your family is not sufficient cause to demand a background check.