Rohnert Park is in Sonoma County, where health officials issued a ban on large gatherings — more than 50 people convening inside, or more than 100 people outside.

Sundari Mase, health officer in Sonoma County, seen in San Francisco last summer, issued an order banning large gatherings — more than 50 people convening indoors or more than 100 outdoors.

Sonoma County is banning large gatherings — anything over 50 people indoors or 100 outdoors — and recommending that all residents shelter in place and avoid contact with those outside their households over the next 30 days to help slow down an omicron-fueled coronavirus surge, health officials said Monday.

The directive comes as the county, along with the rest of the Bay Area, is assailed by a massive spike in coronavirus cases that health officials said is threatening hospital capacity.

Sundari Mase, the Sonoma County health officer, said in a statement.

Health officials said that models suggest without further mitigation efforts, hospitalizations in this surge could top 380 a day.

Of cases where the coronavirus exposure could be determined, more than half were from large gatherings, health officials said.