Workers say president’s attacks on the agency and lack of qualified leadership could lead to deadly catastrophe

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Donald Trump’s attacks on the Federal Emergency Management Agency (Fema) risk exposing the US to another Hurricane Katrina, staff at the agency have warned Congress in a withering critique that also takes aim at its current leadership.

Writing in the run up to this week’s 20th anniversary of the devastating 2005 storm that killed 1,833 people and caused widespread destruction in New Orleans and the Gulf coast, more than 180 current and former Fema employees say the Trump administration’s policies are ignoring the mistakes that led to it.

The letter, sent to members of Congress and a council formed to examine the agency’s future, follows months of criticism of Fema from Trump and senior administration officials, who have threatened to close it, prompting more than 2,000 staff – about one-third of its permanent workforce – to depart, leaving it short of institutional expertise in key positions.