dialysis patients, requiring more critical care. they're going by ground, by ambulances and more critical patients by helicopter. this is, since we've been here, more ambulances are coming in right now, actually. >> as we watch it play out on the ground, we're limited what we can see. is it as calm and methodical? >> reporter: very calm and methodical. doing a fabulous job. it's not every day two black hawk helicopters land on the ground in small city in texas. something they weren't expecting. to be clear, things were going quite well until last night. we've been here a few days. after the flooding, without water in hotels and found out