The FIRE Cancer Act of 2026 expands federal grant programs to help firefighters prevent and detect cancer, a significant occupational health risk in the fire service. The bill allows firefighters to use federal assistance grants to establish cancer prevention programs, including multi-cancer early detection testing and other preventative screenings, with a cap of $1,750 per test. The legislation authorizes $700 million in federal funding specifically for these cancer prevention grants administered through the Federal Fire Prevention and Control Act's existing assistance program. Additionally, the bill creates a voluntary research partnership between FEMA and the Centers for Disease Control and Prevention to track cancer screening results from participating firefighters in order to identify patterns and causes of cancer in the profession, while maintaining strict privacy protections for individual test results.