From the FAA:
Texas Drone Users,
The FAA warns unauthorized drone operators that flying a drone could interfere with the U.S. National Guard, U.S. Marine Corps, U.S. Coast Guard, and the Texas Military Department's rescue and recovery missions as evacuations escalate due to rising water.
You could be subject to significant fines if you interfere with emergency response operations.
Flying a drone without authorization in or near the disaster area may violate federal, state, or local laws and ordinances, even if a Temporary Flight Restriction (TFR) is not in place.
Allow first responders to save lives and property without interference.