This Won't Do (2)

The sky overhead had turned into the deepest shade of grey possible before it turned completely black as raindrops drenched everything in sight. The area everywhere was surrounded by buildings... broken beyond repair.

Still, the people were forced to take shelter in these houses and covered their heads with whatever they could find so that the acid pouring down from the sky did not do much physical damage to them. But that wasn't enough to protect them indefinitely. 

There were others around these people as well. But they were well armoured and the rain did not affect them all that much. Probably because those in armour were werewolves while those hiding were mere human slaves brought there to help in the construction of the new stronghold for the soldiers to stay in as they ventured in and out of the swamps.