Tent City Jail - a prison in the desert of Arizona, USA. If you're in this place, you are in for tough times. As the name indicates, tents instead of cells make up prison housing, old army tents left over from the Korean War. The problem with tents - no insulation so it gets unbearably hot in the summer, freezing cold in the winter. Summer daytime temps can get up to 140 degrees Fahrenheit with nighttime temps often dropping to below freezing.