Early on Sunday morning, Bill Bishop, managing editor of Houston's KHOU 11 News, arrived at his station's headquarters to find floodwaters from Harvey creeping into the building and soaking the carpet.

The station was just south of a bayou, whose banks had swollen after 24 hours of torrential rain.

And it was only going to get worse.

Still, the station had a newscast to produce. Employees began moving operations upstairs, Bishop said on Twitter. Soon, KHOU had set up a makeshift studio on the second floor of the building and continued to broadcast live about the storm wreaking what officials called "catastrophic" flooding upon the country's fourth-largest city.