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.

The head of FEMA's Urban Search and Rescue branch, Ken Pagurek, resigned on Monday, multiple sources confirmed to ABC News.

Urban Search and Rescue Chief Ken Pagurek quit over a new policy that led to delays in FEMA's response to the flooding in Texas on July 4, sources said.