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The Mississippi River tops a new list of America's most endangered rivers, in part because federal officials propose shifting flood disaster costs to states.

The Federal Emergency Management Agency's acting chief advocates moving recovery responsibilities to state governments.

Eileen Shader, senior director of flood plain restoration for the advocacy group American Rivers, which issued the report, warned it could destabilize flood protections for communities along the Mississippi.

"The Trump administration has called for FEMA to be dramatically changed, if not eliminated," Shader pointed out. "We thought it was really important to highlight the importance of FEMA and the federal role in managing disasters like flooding to our local communities."

The 2025 Most Endangered Rivers report noted it is the Mississippi's 13th appearance on the list, citing the river's history of "catastrophic floods," which have shaped national disaster policies.

FEMA has historically followed what can be described as a "locally executed, state-managed, federally supported" disaster model. Shader argued the partnership is critical for multistate crises.

"Especially we see really catastrophic events, we see national disasters declared, which opens up a lot of federal funding which can then flow to states and local communities to help them to recover and to become more resilient in the future," Shader emphasized. "It's a shared responsibility."

About 20 million people depend on the Mississippi River for drinking water, agriculture and wildlife habitat, which advocates say are all at risk if FEMA reduces flood response support this summer.