The US Federal Emergency Management Agency (Fema) has reportedly suspended a number of staff who criticized the agency's direction under US President Donald Trump. The staff are said to have been among those who recently signed an open letter that castigated Trump officials over cuts and alleged interference, warning that another national catastrophe akin to Hurricane Katrina was possible. More than 20 employees were told on Tuesday that they had been put on administrative leave, according to sources who spoke to the BBC's US partner, CBS News. The BBC has asked Fema for comment. There has been renewed scrutiny of US disaster readiness after recent deadly flooding in Texas.

Trump set about drastically overhauling the disaster-management agency soon after returning to office in January, when he mooted the idea of maybe getting rid of Fema altogether. He has characterized the organization as inefficient and suggested that state-level officials were better placed to respond to natural disasters.

Reports suggest that hundreds of employees - representing about a third of Fema's workforce - have left their jobs since the start of the year for various reasons. Of the 191 Fema employees who signed Monday's open letter criticizing the agency's direction under Trump, the majority remained anonymous. The letter reflected on the 20th anniversary of Hurricane Katrina, pointing out that the storm had claimed more than 1,800 lives and had highlighted the need for competent American disaster-management leadership. It took the Trump administration to task for cuts to the agency's funding and workforce, the failure to appoint a permanent agency boss, and other issues including the perceived censorship of climate science.

The row over the Fema suspensions comes with the North Atlantic hurricane season under way and with expectations that the agency will be busier than usual because of warmer sea temperatures – made more likely by climate change.