California, Arizona, Texas and Florida together reported about 36,000 new coronavirus cases Wednesday as restrictions aimed at combating the spread of the pandemic took hold in the United States and around the world in an unsettling sign reminiscent of the dark days of April.The soaring counts of confirmed infections and a mounting death toll led the mayor of Los Angeles to declare that the nation’s second-largest city is on the verge of resorting to a shutdown of all but essential businesses. More school districts made plans to start the fall semester without on-site instruction, and the 2021 Rose Parade in California was canceled. Other events went ahead undeterred. Thousands of auto-racing fans gathered at Bristol Motor Speedway in Tennessee for a NASCAR event. Officials allowed 30,000 at the track, and the event marked the largest sporting event since the pandemic began four months ago. Disney World moved forward with the rolling opening of its Florida theme parks. California, Arizona, Florida and Texas reported a total of more than 450 new deaths. Alabama reported a pandemic-high one-day total of 40 deaths, and officials said the state will begin requiring face masks. In Texas, which again set a record for confirmed new cases, with nearly 10,800, Republican Gov. Greg Abbott has increasingly emphasized face coverings as the way to avoid another lockdown. Montana Gov. Steve Bullock required masks at indoor public spaces and at larger outdoor gatherings in counties where four or more people are known to have COVID-19. The Democrat’s order came as the state reported a record number of new confirmed cases. In Ohio, Gov. Mike DeWine, who has faced criticism from fellow Republicans over business closures, gave a televised address with an emotional appeal to residents to make sacrifices to protect their neighbors. But he stopped short of mandating masks. Among the sternest measures were in New York, where Democratic Gov. Andrew Cuomo added to a list totaling 22 states whose visitors will be required to quarantine for two weeks if they visit the tri-state region. Out-of-state travelers arriving in New York airports from those states face a $2,000 fine and a mandatory quarantine order if they fail to fill out a tracing form.