The fatalities bring the number to 17 so far this week and 340 overall, according to the OC Health Care Agency. Last week was the deadliest week so far in the COVID-19 pandemic in Orange County, with 56 deaths reported.
The county's total coronavirus case load stands at 13,843.
"While the report today - and the recent increased rate of infections - is concerning, the County and our local health system continue to be prepared to respond to protect the health and safety of our residents," Board of Supervisors Chair Michelle Steele said in a statement, noting that the county was the fourth in the state to declare a local emergency as early as February.
The interim county health officer is considering issuing a health order to close bars in Orange County "if, in his medical opinion, it is appropriate to do so," Steele said.
Stricter stay-at-home restrictions may return for Californians, Newsom says as COVID-19 cases climb
She strongly encouraged residents follow federal, state and local health guidelines, including wearing face coverings, regular hand washing and physical distancing.
The director of Orange County's Health Care Agency said there is a lag in the 779 new cases reported on Tuesday and that the county is using the state's CalREDIE system. He said the number of new cases reported on Tuesday is for several days and he expects to have a more accurate number at some point later on Tuesday.
Gov. Gavin Newsom said Monday that Orange County, along with Solano, Merced and Glenn counties, had been added to the state Department of Public Health's watch list due to increasing percentages of positive tests. Orange County is one of 19 counties in the state being monitored.
The U.S. is "going in the wrong direction" with the coronavirus surging badly enough that Dr. Anthony Fauci told senators Tuesday some regions are putting the entire country at risk - just as schools and colleges are wrestling with how to safely reopen.
With about 40,000 new cases being reported a day, Fauci, the government's top infectious disease expert, said he "would not be surprised if we go up to 100,000 a day if this does not turn around."
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City News Service contributed to this report.