Replaces subparagraph (A) of the definition of 'at‑risk community' to define it as a group of homes and other structures with basic infrastructure and services within or adjacent to Federal land (removing the prior alternative referencing an 'interface community').

Amends subsection (f) of 16 U.S.C. 6592 (Section 40803(f) of the Infrastructure Investment and Jobs Act) to expand the definition of eligible 'projects' by adding a new paragraph (3)(D) that explicitly authorizes structure hardening and related modifications to structures and adjacent areas.