The HEARTH Act, enacted on May 20, 2009, significantly alters HUD's homeless assistance programs with an emphasis on prevention, rapid re-housing, and permanent supportive housing. Key changes include a new funding structure for Emergency Solutions Grants (ESG) and a streamlined Continuum of Care (CoC) program, with a focus on performance and outcomes rather than just administration. The Act also expands the definition of homelessness and increases flexibility and funding for preventing homelessness, highlighting the importance of collaborative efforts in addressing these issues.