"FEMA is going to be there for years," administrator Brock Long said Sunday on CNN's "State of the Union." He said that "this disaster is going to be a landmark event."

Spearheading the government's emergency and crisis response, FEMA is focused on the immediate reaction to the storm, but is also "pushing forward" teams focused on recovery housing and flood insurance program policy. "We're setting up and gearing up for the next couple years."

While Long compared the current crisis to the aftermath of Hurricane Katrina, he said Harvey poses different challenges and was "nothing like" it. He stressed the days-long threat it poses as it makes its way further into Texas. "This is a storm that the United States has not seen yet," he said.