Nevada Gov. Steve Sisolak tightened restrictions on casinos, restaurants and private gatherings beginning Tuesday. In California, where most counties are under a curfew, Los Angeles County officials will prohibit in-person dining for at least three weeks, and a judge on Monday denied a request to temporarily restore indoor service at restaurants and gyms in San Diego County. Nebraska Gov. Pete Ricketts warned that he could impose tighter social-distancing restrictions before Thanksgiving if hospitalizations continue to rise.