RANCHO CORDOVA, Calif. — SAN FRANCISCO (AP) — As the coronavirus surges in California, at least four counties are halting or preparing to backtrack on their efforts to reopen local economies. Gov. Gavin Newsom said Friday he wants agricultural Imperial County to reimpose stay-at-home orders due to a high rate of positive tests. In Northern California, San Francisco and Marin counties halted the planned reopening of some businesses. In Southern California, San Bernardino County officials are sounding the alarm about whether they'll have enough hospital beds. The shift comes as California grapples with a rise in coronavirus cases, especially among younger adults, after Memorial Day, protests and a number of business reopenings.