Most emergency work is exempt from full NEPA review under Stafford Act Section 316, but other laws still apply, including the Endangered Species Act, the National Historic Preservation Act, solid waste and clean air and water laws, and the floodplain and invasive species executive orders. Debris must be staged at a safe distance from water, wetlands, wells and property lines, and you are responsible for the permits.
Debris staging and disposal site locations and permits, any state or local conditions you followed, site remediation records for staging areas, and for completed emergency work, documentation showing compliance after the fact.
Burning debris, clearing waterways, building temporary roads or berms and demolishing structures all carry EHP risk even in an emergency. If the work is already done, you still need records showing it complied, so photograph and document staging sites before, during and after use.