Rainy Monster Infested Post Apocalyptic City Ambience

The dripping rain through the broken cracks. The creak of the building perhaps about to collapse any moment. The crack of lighting and roil of thunder. The storm has hit the city with full force. Off in the distance is the familiar sound of birds, a sign that this storm must soon pass. But there is something else out there something sinister sounding, and completely unknown. Perhaps the storm is not the most dangerous thing this ruined city has in store. The city had been demolished in one of the first waves, but buildings still stood. Rickety as they are, they were better protection from the rain than any other options around. High ground was supposedly safer, though from the sounds of the metal in this building perhaps braving the storm would have been a better alternative. At least the rain isnt quite as heavy in here as outside though the leaks are quite large. Its a hell of a storm outside, and has been raging for hours now. Being up high above the cityscape, able to see everything, it is obvi