George Bush Intercontinental Airport (IAH) and William P. Hobby Airport (HOU) were expected to resume limited domestic airline passenger service as of 4 p.m. Aug. 30, according to the Houston Airport System. They had been closed since noon Aug. 27 due to unsafe conditions produced by Harvey. “The plan is to begin a phased return to service, with full service expected by this weekend," HAS said on its website.