Several storm chasers have been on the ground in Rockport, Tex., a city on the southeast coast of the state about 30 miles from Corpus Christi. And their images from the area show severe damage from Hurricane Harvey, including destroyed hangars at the Aransas County Airport and completely collapsed buildings along the water.

Sitting in a car atop a bridge — the only place he could receive cell service — Jeff Piotrowski said in a Periscope broadcast that he witnessed “moderate to major, in some areas catastrophic” damage in Rockport and the nearby town of Fulton.

“We’re leaving town,” Piotrowski said in the broadcast, alongside fellow storm chasers Mike Theiss and Reed Timmer. “It’s a mega-disaster here.”

Timmer tweeted that the worst Harvey-related damage he had seen was at Holiday Beach, Tex., just north of the bridge from Rockport.