Coronavirus cases have surged to record levels in the Los Angeles area, putting the nation’s largest county in “an alarming and dangerous phase” that if not reversed could overwhelm intensive care units and usher in more sweeping closures, health officials said Wednesday. The situation is so uncertain organizers of the 2021 Rose Parade in Pasadena canceled the New Year’s Day tradition for the first time in 75 years out of concern that even six months from now infections could spread among participants and the hundreds of thousands who line the route. That move came two days after California Gov. Gavin Newsom shut bars and indoor dining statewide, and ordered closures of hair salons, gyms, malls and other indoor businesses in Los Angeles and other counties experiencing the most significant surge of virus cases. In Los Angeles, Mayor Eric Garcetti warned authorities were “on the verge” of resorting to shutting down all but essential businesses.Statewide figures reported Wednesday confirmed 11,126 additional cases of the virus on Tuesday and 140 deaths, the second-highest one-day totals. Los Angeles County, home to a quarter of the state’s population, reported 2,758 more confirmed cases and 44 deaths. The county’s overall death total is just under 4,000 — well over half California’s total of about 7,200.