Some states allow for early voting and absentee voting, but only one state allows for voting from space!
American astronauts, when not in space, call Houston, America home, so that is where they are registered to vote.
According to the Palm Beach Post, Texas passed a law in 1997 that allows astronauts to vote from space...
The threat of showers and even thunderstorms across the state is not expected to put a damper on voter turnout. However, it might be a good idea to have the umbrella in the car before you leave to go vote.