This story originally appeared on CityLab and is part of the Climate Desk collaboration. On January 3, Los Angeles Mayor Eric Garcetti announced the release of ShakeAlertLA, a new earthquake-warning app for residents of Los Angeles County. The app—the first of its kind in the United States—promises to “save lives by giving precious seconds to you and to your family to take action and to protect yourselves,” Garcetti told reporters at a launch event at City Hall.

Learn about your ad choices: dovetail.prx.org/ad-choices