WATCH: TSA, Coast Guard, FEMA leaders testify on effects of partial government shutdown

During a House Committee on Homeland Security hearing Wednesday, acting TSA leader Nguyen McNeill said that more than 480 transportation security officers have now quit amid the ongoing shutdown.

Watch in our video player above.

McNeill reiterated the growing financial strain facing that workforce, including missed bill payments, eviction notices and lost child care.

READ MORE: Why do ICE agents get paid during the partial government shutdown, but not TSA?

"Some are sleeping in their cars, selling their blood and plasma, and taking on second jobs to make ends meet, all while being expected to perform at the highest level when in uniform to protect the traveling public," she said.

Nguyen McNeill added that callout rates have reached 40% to 50% at multiple major airports recently, compared with an average of 4% before the shutdown, because staff "simply cannot afford to report to work."

TSA official warns shutdown could weaken security

"We are really concerned about our security posture and what the long-term impacts of the shutdown is going to have on the workforce and our ability to carry out the mission," McNeill said.

WATCH: Trump rejects Senate proposal to reopen DHS without ICE funding

FEMA official who said he 'teleported' absent from hearing

Gregg Phillips did not represent the Federal Emergency Management Agency at today's hearing despite being scheduled to do so.

News reports last week resurfaced past remarks that Phillips, FEMA's associate administrator of the office of response and recovery, had made promoting election conspiracy theories and claiming that he once teleported to a Waffle House restaurant.

Victoria Barton, an external affairs official, represented FEMA instead. The agency did not immediately respond to a request for comment on Phillips' absence.

FEMA disaster funding running low, official says

The Federal Emergency Management Agency's Disaster Relief Fund is "rapidly depleting," Barton, a FEMA external affairs official, warned lawmakers.

FEMA will be able to continue its disaster response and recovery work as long as the relief fund has money, and about 10,000 of its disaster workers continue to be paid through that fund.

However, the fund has about $3.6 billion left, Barton said. The DHS appropriations bill would have replenished the fund with about $26 billion.

Barton also cautioned that FEMA's preparedness and security grant work is paused months before the FIFA World Cup and the nation's 250th anniversary celebrations.

"This is especially concerning as the nation faces heightened national security concerns," she said.

Thousands of FEMA employees are paid, despite official's remarks

Rep. Michael Guest, a Republican from Mississippi, asked each agency official if their employees were being paid. Each said "No," but when Guest reached FEMA external affairs official Victoria Barton, she paused before saying, "No."

That's incorrect: About 10,000 members of FEMA's disaster workforce are paid through the agency's disaster relief fund, which continues to operate until it runs out of money. That's nearly half the total FEMA workforce.

Committee Chair Rep. Andrew Garbarino, a Republican from New York, quickly followed up, asking Barton to confirm which employees are paid "to make sure you have the right thing on the record."

Barton clarified that the unpaid employees are the ones not being paid out of the disaster relief fund.

No known plans to cut FEMA staff, official says

"I'm not familiar with any current guidance, as far as cutting the workforce by any sort of percentage," Barton told Rep. Timothy Kennedy, a Democrat from New York.

Kennedy asked Barton whether FEMA was still planning to cut its workforce by half. In December, some FEMA managers received an email asking them to engage in a "planning exercise" to identify how they would execute a 50% staff reduction.

Kennedy also expressed regret that FEMA official Gregg Phillips had not represented the agency at the hearing as originally scheduled. News reports last week resurfaced past remarks Phillips made about election conspiracies, claims he once "teleported" to a restaurant, and violence against former President Joe Biden.

"All of which, to me, makes him wholly disqualified to hold his position," Kennedy said.

Lawmaker questions rapid training for ICE agents assisting at TSA checkpoints

New Jersey Rep. LaMonica McIver, a Democrat, pressed TSA leadership about how ICE agents could be prepared in roughly 72 hours to assist at airport checkpoints when TSA training typically takes about six months.

In response, McNeill said ICE personnel deployed to some airports are conducting "nonspecialized screening functions," including helping manage long lines, checking travel documents and instructing passengers on how to load their bins.

"All of these require certain levels of training, and we've done that over the first few days of this week," McNeill said.