From the Document: "Many natural disasters occur with little or no warning. Whether or not advance notice is possible, the preservation of life is always paramount during any type of disaster. The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) urges all persons to take steps to protect family and property by having a disaster preparedness plan in place before any disaster occurs. [...] The following are suggestions of voluntary measures Federal Explosives Licensees and Permittees (FEL/Ps) can take to help protect explosives business premises and inventories in the event of a natural disaster and guidance on what to do if the business premises is damaged or destroyed by a natural disaster."
ATF Publication 5400.16; Bureau of Alcohol, Tobacco, Firearms, and Explosives Publication 5400.16
Bureau of Alcohol, Tobacco, Firearms, and Explosives: https://www.atf.gov/