More than a dozen children have been hospitalised with a rare coronavirus-related symptom.
Fifteen children in Los Angeles County were diagnosed with multisystem inflammatory syndrome (MIS-C), a rare inflammatory condition linked to COVID-19.
MIS-C is a condition where different body parts can become inflamed, including the heart, lungs, kidneys, brain, skin, eyes, or gastrointestinal organs.
There have so far been six deaths related to the syndrome nationwide, according to health officials.
The majority of the children, 73 per cent, are Latino the public health department said.
The Los Angeles County Department of Public Health on Sunday listed 2216 people in hospital with coronavirus, topping the previous record of 2193 on July 15.
Of those currently hospitalised, 26 percent are in intensive care and 19 percent are on ventilators, officials said.
"We continue to reach concerning milestones and today we are seeing the highest number of COVID-19 hospitalisations," Barbara Ferrer, the county's public health director, said in a statement.
"Right now, young adults are being hospitalised at a rate not seen before.
"No matter how young you are, you are vulnerable to this virus."
Los Angeles set to reissue stay-at-home order
Los Angeles Mayor Eric Garcetti reiterated on Sunday that the city was "on the brink" of reissuing a stay-at-home order because of the surge in the number of COVID-19 cases, and he implored the public to heed safety precautions such as wearing a mask and social distancing.
He also acknowledged that the state had lifted restrictions related to the virus too soon.
"I think a lot of people don't understand, mayors often have no control over what opens up and doesn't – that's either at a state or county level, and I do agree that those things [reopening businesses] happened too quickly," Mr Garcetti told CNN on Sunday.
"It's not just what's opened and closed, it's also about what we do individually.
"It's about the people who are getting together outside of their households.”
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