Story highlights

NEW: Family of 13-year-old girl expects her leg will be saved

Two teens lost arms in separate shark attacks at the same beach

The attacks occurred within 90 minutes of each other

CNN  — 

Any other summer day, the waters off North Carolina’s Oak Island would be alive with the sounds of vacationers frolicking in the surf.

On Monday, the beach wasn’t empty, but nearly everyone stayed on dry land.

The reason?

It was the day after two teenagers lost arms in separate shark attacks.

This area, which has mostly houses and no high-rises, does not attract the throngs of visitors that more touristy beaches do. It’s mostly a haven for families that come and rent houses and enjoy the beach. But even by local standards, the beaches were quite desolate.

Helicopters from the Brunswick County Sheriff’s Office monitored the coastline Monday.

The victims

A 13-year-old girl and 16-year-old boy each lost an arm Sunday in separate shark attacks at the same North Carolina beach.

Both victims were airlifted to New Hanover Regional Medical Center in Wilmington. Both arrived in critical condition, according to hospital spokeswoman Martha Harlan.

Harlan said each has had an arm amputated – his below the shoulder, hers at the elbow. The girl also sustained serious tissue damage to her leg, according to Harlan.

On Tuesday, the family identified Yow as one of the victims and confirmed that she lost a portion of her left arm below the elbow and suffered injuries to her left leg.

Her parents, Brian and Laurie Yow, said in a statement that their daughter was transferred to N.C. Children’s Hospital at UNC on Monday where, “she remains in stable condition and is receiving excellent care.”

Her road to recovery will be long and will include surgeries and rehabilitation, they said, “but her doctors at UNC expect she will keep her leg and for that we are grateful,” the Yows said in the statement.

They also asked for privacy, “as we navigate this difficult situation.”

Wallace told CNN that shark attacks are so rare at Oak Island – a beach town on the state’s southernmost coast – that she couldn’t remember one occurring before Sunday.

Witness Jason Hunter told CNN affiliate WWAY that the shark involved in the attack on the boy was 7 or 8 feet long.

Both incidents occurred at high tide in the vicinity of Ocean Crest Pier, a popular destination among beachgoers.

“At the pier this time of year, I’m sure the beach was packed,” said Wallace.

The pier is also a popular spot to fish from, meaning there was likely bait in the water that could have attracted sharks.

Emergency call

A 911 call released by Brunswick County captured the drama of the first attack.

The dispatcher tells the caller, “we’re getting help on the way. Are any of the fingers completely amputated?”

The response: “It looks like her entire hand is gone,”

Off-duty EMT

Marie Hildreth, an off-duty EMT, happened to be vacationing at the beach, and ran to provide aid after hearing someone yelled “shark!”

Seeing that the girl was hemorrhaging, Hildreth decided to put tourniquets on two different limbs, she told CNN’s Anderson Cooper.

She used what was available: a string from a boogie board and a string from a tent.

One of the first on-duty paramedics at the scene, Tracy Carnes, credited bystanders’ help for saving the girl’s life.

“The outpouring of help from the bystanders was amazing,” she told CNN’s Erin Burnett. “The tourniquets were in place by the time I got there.”

Shark attacks are considered rare

About four or five people are bitten by sharks on North Carolina beaches each year, said George Burress, an ichthyologist and fisheries biologist with the Florida Museum of Natural History. The incidents usually involve smaller sharks, he said.

“Having a series of injuries so close to each other in time and space makes this unusual,” he said. “Two in one day very close to each other suggests that there’s a focused problem. It might suggest a single shark has been involved.”

He suspects the predator could be either a bull or tiger shark, both of which are undaunted by larger prey, he said.

“They may have interpreted the humans as being appropriate in size and behavior to give it a shot,” the researcher said.

Only three times in the four decades that he’s been studying sharks has Burgess seen attacks happen “so closely in time and space,” he said. The other incidents occurred in Egypt and Florida.

Any number of factors, including an abundance of fish or nesting turtles, could draw sharks to the area, Burgess said.

Burgess urged people to remember that despite the horrific nature of Sunday’s attacks, shark attacks are unusual. Last year saw 72 attacks, only three of which were fatal, he said.

“Considering the billions of hours we spend in the sea,” he said, “it’s clear that shark attacks aren’t common.”

Shark bites boy wading in waist-deep water in Cocoa Beach, Florida

CNN’s Mary Helen Moore, Eliott C. McLaughlin, Stephanie Gallman, Shawn Nottingham and Pat St.Claire contributed to this report.