If you like to be prepared for any emergency, consider purchasing one of these:
Amazon has a great deal on Fire Escape ladders!
You can get the Kidde KL-2S 13' Two-Story Fire Escape Ladder with Anti-Slip Rungs on sale for $24.66 shipped.
Or get the First Alert EL52-2 14' Two-Story Steel Anti-Slip Fire Escape Ladder on sale for $26.39 shipped.
Both get amazing reviews!