With the July 4 holiday weekend only days away, California Gov. Gavin Newsom announced on Monday that 19 counties home to 72% of the state’s population are now on a “watch list” for additional COVID-19 restrictions.

Four new counties — Solano, Merced, Glenn and Orange — were added Monday to the list of hard-hit locales where state health officials are monitoring infection data, providing technical assistance and weighing new measures to slow the spread of the virus.

Even after the closures, local health officials warned on Monday of “alarming” increases in the number of new COVID-19 cases in L.A., and County Supervisor Janice Hahn announced on Twitter that officials plan to close beaches for the holiday from July 3-6.

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In the most severe case in Imperial County, Newsom said the state is prepared to intervene should county supervisors refuse to revert to a strict stay-at-home order.

As of late last week, the county had the state’s highest COVID-19 hospitalization rate.