from http://www.fly2houston.com/iah/alerts/

HOUSTON AIRPORTS PREPARES TO RESUME OPERATIONS AFTER HURRICANE HARVEY
The Houston Airports plans to resume limited domestic airline passenger service TODAY at 4 p.m. following severe weather caused by Hurricane Harvey. The plan is to begin a phased return to service, with full serice expected by this weekend. Contact your air carrier for specific flight status updates regarding your flight. Only those with a ticket for a confirmed scheduled flight should come to the airport. Many roads around the City of Houston are still unsafe for travel, therefore, we urge all passengers to take their time arriving to the airports and to solidify a safe route to and/or from our facilities.