Plus the two aren't mutually exclusive. You could just as easily go to prison and then just be abandoned there once the climate becomes uninhabitable anyway. Wouldn't be the first time:

Back in 2005, when Katrina hit New Orleans, prison guards abandoned prisoners in locked cells as the floodwaters rose chest-high. Several thousand of those inmates were eventually rescued, but then miserably housed on a broken piece of interstate, directly exposed to the Southern summer sun.