Ken Pagurek, the Federal Emergency Management Agency's Urban Search and Rescue chief, has resigned amid criticism over the agency's delayed response to Texas flooding and efforts by the federal government to dismantle the organization.

Ken Pagurek had become increasingly frustrated with the Trump administration’s efforts to dismantle the agency, CNN reported.

The head of FEMA’s Urban Search and Rescue branch, which runs a network of teams stationed across the country that can swiftly respond to natural disasters, resigned on Monday.