San Francisco Mayor London Breed has declared a state of emergency in the city.

Breed said the city is "taking the necessary steps to protect San Franciscans from harm."

The coronavirus outbreak, which began in China, has spread in Asia, the Middle East, and Europe. There are now 60 confirmed cases in the US. Worldwide, more than 2,800 people have died from COVID-19 with more than 80,000 infected.

On Tuesday, the Centers for Disease Control and Prevention issued a warning that an outbreak in the US was inevitable.

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San Francisco's mayor has declared a state of emergency in the city over the coronavirus outbreak.

Mayor London Breed announced Tuesday afternoon that while there haven't been any confirmed cases of the coronavirus disease, COVID-19, in San Francisco so far, the city needs to be prepared in case the virus spreads to the area. The San Francisco Chronicle was the first to report the news.

"The global picture is changing rapidly, and we need to step-up preparedness," Breed said in a statement. "We see the virus spreading in new parts of the world every day, and we are taking the necessary steps to protect San Franciscans from harm."

The mayor's state of emergency allows the city to ramp up emergency planning, redirecting employees and resources in the case of an outbreak in San Francisco. While zero cases of the disease have originated in San Francisco so far, three people have been treated at local hospitals for COVID-19, according to the Chronicle. On Tuesday, officials with the Centers for Disease Control and Prevention warned that a coronavirus outbreak in the US would be inevitable.

San Francisco is not the only city in California to use this strategy to combat the virus. Earlier this month, San Diego declared public health and local emergencies, which would redirect state and local funds in the case of an outbreak. Solano County, about 60 miles outside of San Francisco, also declared a local emergency Thursday. The declaration was made after the first case of possible "community spread" of the virus — in which a person contracts the virus from unknown origins — was detected there. The patient is the 15th confirmed case of the coronavirus in the US and is being treated at UC Davis Medical Center.

San Francisco's proximity to China and the volume of travel between the two areas were factors in declaring the state of emergency. Tech workers in the area have already been affected by fears of the virus spreading: Silicon Valley venture capital firm Andreessen Horowitz has been asking visitors to avoid handshakes due to the coronavirus outbreak, and other tech companies are taking action by halting business travel to China, according to Recode.