Here’s a list of California counties that were on the state’s coronavirus watchlist as of July 17. Schools in these counties, which are hard hit by the coronavirus, must begin fall classes teaching students remotely online, rather than allowing them to return to classrooms, according to Gov. Gavin Newsom.

Schools can begin teaching in classrooms only when the county is off the watch list for 14 days. Thirty-two of California’s 58 counties are on the list, according to Newsom, who unveiled a series of rules that determine when students can return to classrooms and the measures schools must take to prevent the spread of COVID-19 and deal with any cases that occur.

Newsom made clear Friday that the online teaching requirement in watchlist counties is a mandate, not a suggestion. It applies to private as well as public schools.

Here are the counties on the watch list and being monitored by the state as of Friday:

Alameda

Colusa

Contra Costa

Fresno

Glenn

Imperial

Kings

Los Angeles

Madera

Marin

Merced

Monterey

Napa

Orange

Placer

Riverside

Sacramento

San Benito

San Bernardino

San Diego

San Joaquin

San Luis Obispo

Santa Barbara

Santa Clara

Solano

Sonoma

Stanislaus

Sutter

Tulare

Yolo

Yuba

Ventura