The number of Californians being treated in intensive care for COVID-19 has nearly tripled since Friday, and hospitalizations in the state nearly doubled. While testing lags, experts say these numbers are a key marker for understanding the state’s outbreak.

California Gov. Gavin Newsom said Monday that the number of people hospitalized across the state with the new virus was 1,432. That number nearly doubled since Friday, when there were 746 people in the hospital.

Of those, 597 were in intensive care units Monday — nearly triple the number on Friday, when 200 people were in the ICU.

“These have long been projected based upon our modeling,” Newsom said on Monday. “We have for weeks now been organizing ourselves around a surge that will require roughly two-thirds increase in capacity within our hospital system.”

Confirmed cases in the Bay Area surpassed 2,000 on Monday afternoon, as the state’s total topped 7,100.

In San Francisco, there were 58 COVID-19 patients in public and private hospitals as of Monday, said Dr. Grant Colfax, director of the city’s health department. However, he said during a news conference “that number could rapidly change.”

The county, along with most Bay Area counties, does not typically report the number of hospitalized cases in daily updates.

Santa Clara County was the only Bay Area county that had been reporting hospitalization numbers. However, it created a new case-tracker dashboard that does not include that information. On Friday, before the change, there were 154 people in that county who were hospitalized with the virus.

Across the state, efforts are underway to get supplies and personnel where they are needed to meet the surging number of COVID-19 patients. Frontline workers across the nation have decried a lack of necessary supplies, including ventilators and personal protective equipment.

Anna Bauman is a San Francisco Chronicle staff writer. Email: anna.bauman@sfchronicle.com Twitter: @abauman2