Los Angeles County reported another 20,414 new cases of COVID-19 and 207 additional deaths today, although 40 of the deaths were from a backlog associated with a Spectrum outage and holiday reporting delays.

The number of coronavirus patients in county hospitals rose to 7,613, the highest number seen during the pandemic, with 21% of those people in intensive care units.

Conditions continue to worsen at hospitals in the county, with ambulances waiting up to eight hours to off-load patients, leading to a shortage of paramedic crews on the streets and longer 911 response times.

Amid the unfolding disaster, the U.S. Army Corps of Engineers is sending experts to help with the oxygen delivery systems at six of the county’s older hospitals, state officials announced Friday.

“We’re running out of ambulances, and our response to 911 calls is getting longer and longer,” Cathy Chidester, director of the county Emergency Medical Service agency said.

The team from Army Corps of Engineers will evaluate the oxygen systems at six county hospitals, including Lakewood Regional Medical Center in Lakewood and PIH Health Hospital in Downey.

“By working to upgrade challenged oxygen delivery systems at these older hospitals we can improve the ability to deliver life sustaining medical care to those who need it,” said Mark Ghilarducci, director of the Governor’s Office of Emergency Services. Dr. Christina Ghaly, the county’s health services director, has said that some hospitals’ pipes cannot maintain sufficient pressure and might even freeze.

The military experts will oversee any upgrades deemed necessary at the affected hospitals.

The most recent figures from the county showed a total of 773 available and staffed hospital beds, including just 57 adult ICU beds. Those numbers change rapidly throughout the day.

With increased hospitalizations come increased deaths, and the county on Thursday reported a record 290 fatalities—though some of those deaths were attributed to the reporting backlog dating back to the Christmas holiday weekend. County Public Health Director Barbara Ferrer noted that 86% of people who have died from COVID-19 in the county had underlying health conditions, down from more than 90% in the early days of the pandemic. That drop “indicates that, in fact, there are more people than ever not only passing away, but passing away without any underlying health conditions.”

Ferrer again pointed to younger residents for driving up the number of cases. She said among people aged 30 to 49, an average of 4,419 people per day are testing positive for the virus, an 850% increase from early November, when an average of 463 tested positive daily. Among 18-29 year olds, the daily average has more than doubled. But those younger patients aren’t the ones dying from it. In a standard pattern, younger residents are being infected more often, then passing the virus to older residents, who are at higher risk of being hospitalized or dying. Ferrer noted that among people aged 80 and older, an average of 40 people are dying every day from the virus—up from four in early November.

“With no decline in the number of new cases, our hospitals continue to be overwhelmed,” Ferrer said. “As more and more people are rushed to hospitals, the tragic fact is that hundreds more people will die every week from COVID-19. These trends unfortunately will continue into January, and if we do nothing, definitely beyond.” Ghaly noted that many coronavirus testing sites will be closed Friday due to the New Year’s Day holiday.

Nearly 4,737,000 individuals had been tested as of Friday, according to the Los Angeles County Department of Public Health, with 16% of people testing positive. The county’s coronavirus toll now stands at 790,582 cases and 10,552 fatalities.