TOPSHOT - People view the flooded highways in Houston on August 27, 2017 as the city battles with tropical storm Harvey and resulting floods.  
Massive flooding unleashed by deadly monster storm Harvey left Houston -- the fourth-largest city in the United States -- increasingly isolated Sunday as its airports and highways shut down and residents fled homes waist-deep in water. / AFP PHOTO / Thomas B. Shea        (Photo credit should read THOMAS B. SHEA/AFP/Getty Images)