From SuspireWiki

Description

There are 250 miles of flood tunnels under the city of Las Vegas. While the city above ground tends toward hot and dry the tunnels stay cool with breezes generated by the traffic as cars drive by the flood intakes. Most people expect sewers and flood tunnels to be small, cramped and water soaked places filled with mold and mildew but that is not the case beneath Las Vegas. The tunnels are tall and wide, with ceilings about 7 feet high and wide enough for four people to walk abreast. The first few feet into the flood tunnels are lit up from the outside but after that the darkness becomes oppressive and complete. There are no lights, no road maps and no deviations from the cement to serve as land marks.

On occasional areas of the tunnels, cul de sacs and such seem to have been made into impromptu art galleries of graffiti, areas claimed by gangs that will shoot first and never bother to ask questions when they find some one else in their spots. Near the strip are colonies of people, dirty, hungry vagrants, drug addicts and alcoholics, nearly a thousand of them live in corners and side areas of the tunnels. They never seem to take kindly to anyone who wanders into their homes and over the years several people who’ve gone missing were reported as having wandered frequently through the maze beneath the city. Of course, who knows what else is down there?

The thing to remember, of course, is that they are called flood tunnels for a reason, and while the city doesn’t get much rain, when it rains it pours and the hard packed lifeless sand around and through the city isn’t capable of soaking rain water up, so even a few harmless seeming inches of rain will fill the flood tunnels to overflowing. Nearly every rain storm a dead body washes out of the tunnel with the rain.