There is no industry. Without gasoline this entire state would stop cold in three days. Pity those who would need to get out just for mere survival then and don't want to walk the 2000 miles.
Without gasoline most states would shut down in 3 days. I'm not sure I understand the second part of your post. Do you mean "pity those who, if a disaster were to hit Alaska, needed to get out of the state"?