Los Angeles may hold off on allowing big gatherings until 2021 because of the coronavirus threat, according to an internal Los Angeles Fire Department email reviewed by The Times. Mayor Eric Garcetti raised the issue during his weekly briefing Monday with a group of high-level staff from several departments, including Fire Chief Ralph Terrazas. Garcetti indicated during the conference call that “large gatherings such as concerts and sporting events may not be approved in the city for at least 1 year,” according to the email.