I don’t know where they go to rest by day, but Austin has Chimney Swifts. They don’t seem to be bothered by lights at night, as they like to swoop around big parking lots with tall lights. The lights attract bugs which attract the swifts. You hear them call but generally can’t see them unless they pass extremely close to a light. They stay above the lamps which block the glare of the lights.
We had swifts living in our chimney for decades. As far as I remember they returned to the roost in the evenings. They had noisy chicks
That sounds more like Nighthawks than Chimney Swifts… swifts aren’t nocturnal. If the call sounds like “peent…peent,” they are nighthawks.
Nighthawks like to nest on the flat roofs of commercial buildings and such.