First, you can check if a federally declared disaster impacts you at the IRS Tax Relief In Disaster Situations website.
The Tax Relief Options can include an extension for filing your tax return and expedited refunds. You can report your losses on Form 1040, which you would typically file, or you can use an amended return with Form 1040-X. Whether you use Form 1040 or Form 1040-X, you must also include Form 4684 to report your disaster-related losses.