When I was shooting images of a shuttle launch the heat was unbearable, 101º on the lawn, who knows what it was in the parking lot. The national guys brought in huge air conditioning trucks and had miles of collapsable, plastic, ducting to keep their broadcasters from sweating in their equally elaborate sets.
There was a local guy who had to set up on the edge of the parking lot under a small tent, and behind a fold-out table for a desk. He was wearing some soccer shorts and a tee shirt. Right before his broadcast an intern would bring him a fresh shirt, jacket, and clip-on tie and he sat with his feet in a bucket of ice water. Looking good from the waist up is all that matters.