People Are Waiting In Line For Hours To Donate Blood In Las Vegas

In the wake of the deadliest mass shooting in modern American history, Las Vegas Mayor Carolyn Goodman implored healthy residents to donate blood. At least 58 people were killed and more than 500 were injured when a gunman opened fire on a country music festival on the Las Vegas Strip Sunday night, firing at concertgoers from the 32nd floor of his room at the Mandalay Bay hotel.

“What we ask for is blood," Goodman said at a Monday morning news conference. "If our people want to do something and they are healthy, then please donate blood." And show up they did.

Even before the mayor's statement, Las Vegans had already begun showing up in droves to donate blood following the massacre. At 4 a.m., the Las Vegas Police Department had tweeted asking people to donate blood and listing a location:

As local KTNV news anchor Yasmeen Hassan tweeted at 4:50 a.m. this morning, the line to donate blood was already out the door hours before sunrise at United Blood Service, where people had waited all night for the nonprofit to open.

By the 7 a.m. hour, there were long lines at numerous blood donation centers around the area:

By 10 a.m., ABC News estimated that the wait at one location had reached five hours, as hundreds of people lined up to try and be of service.

Twitter users shared photos and videos of the long waits at other locations:

Las Vegas residents still looking to donate blood are urged to make a reservation to avoid the long waits. Here's the information:

The Red Cross urges even those who don't live in Las Vegas to donate blood, which can be used for other emergencies and medical needs, helping to ensure that the organization is "prepared for any blood needs that arise wherever blood is needed," according to Today. To set up an appointment, visit the Red Cross website or call 1-800-RED CROSS.