Millions don't have flood insurance "when they really should," an expert said.
"I want to see two things in Los Angeles, voter ID, so that the people have a chance to vote, and I want to see the water be released and come down into Los Angeles and the state. Those are the two things," Trump said.
This comes as FEMA Administrator Deanne Criswell is set to testify to Congress Tuesday afternoon in Capitol Hill.
A FEMA spokesperson said in a statement the agency is "deeply disturbed by this employee's actions."
Over the weekend, officials said FEMA paused briefly some operations in the state because of threats made against its workers.
A North Carolina man was arrested for allegedly threatening the lives of FEMA employees who were helping Hurricane Helene victims.