About 50 Santa Clarita Valley residents showed up to an impromptu vigil Sunday night, as Americans dealt with the grief and outrage surrounding the nation’s deadliest mass shooting.

Residents and members of the Santa Clarita Valley’s LGBTQ community discussed their reactions to the tragedy, which claimed the lives of 49 people, most of whom were shot and killed in the Orlando nightclub Pulse.

The gunman, Omar Mateen, 29, of Fort Pierce, Florida, was interviewed by the FBI in 2013 and 2014 but was not found to be a threat, the FBI said, according to a CNN report.

In response to the concern on social media, several law enforcement agencies, including the Santa Clarita Valley Sheriff’s Station, reminded everyone about what to do in the event of an incident like the Orlando shooting.

“Anywhere there’s a large amount of people, you have to have a plan, and work it out ahead of time,” said Deputy Mike Sellers of the Santa Clarita Valley Sheriff’s Station, who coordinates the trainings for such an event locally for the station.

Creating an exit strategy in the middle of such a crisis would be much more difficult, he explained, and working out a run-hide-fight plan ahead of time can help someone avoid “freezing” in a traumatic situation, which could save a life.

The first thing deputies suggest you do if such a situation occurs is to run, Sellers said. “If you cant run, then you hide, and if you can’t do that, then the last ditch effort is to fight for your life,” he added, explaining the basic survival philosophy for an active shooter event.  

Every school in the Santa Clarita Valley has a plan in place for such a contingency, Sellers said, and deputies are notified of the plan so they know what the school or agency’s response will be.

Here’s a video created by the Los Angeles County Sheriff’s Department regarding what to do in the event of an active shooter.

If you see something of an emergency nature, please call 9-1-1.