Remember to have a professional turn the gas back on if you have to turn it off. If you leave your house, consider turning off the water, electricity and gas. Be aware that if you turn off the gas a professional will have to turn it on again. There are waiting periods before flood insurance becomes effective. Locate a flourscent flashlight so you can read during blackouts.
Regular flashlights provide lousy light for reading.
A radio with a Weather Alert may be valuable. Refill any prescriptions, including baby and pet medications. Banks and ATMS may stay closed. If you have to go to a shelter please note that most will not permit firearms, alcohol or pets . Such pictures will be invaluable if you have to ask for help in locating loved ones.