It involves off-site storage of tape or disk backups, and plans to weatherproof your equipment. Locate a safe place, outside of your home or office, for off-site backup storage. An off-site area for office backups might be a home safe. An off-site area for the home backups might be a bank's safe deposit box. On a routine basis, make special backups and save them in the off-site area.
Many organizations move backups to off-site locations daily.
Find a location for your equipment that keeps it away from windows and away from rising water. Have sheet plastic available, or heavy construction debris bags. If it looks as if a hurricane is headed your way, make a backup, disconnect your equipment, cover or wrap it and move it to higher ground. Remember not to block exits or leave gear on the ground where you might stumble over it in darkness. Make sure you have enough insurance coverage to replace existing items in case of disaster or theft.