Wilmington Mayor Marty Orr said at a news conference that the city was still coming to grips with the magnitude of the tragedy.
"This really kind of increases it tenfold but we'll get through it,'' he said.
In Texas, Hager's father said Tuesday that both vehicles involved in the crash were engulfed by flames, prompting investigators to turn to DNA to positively identify the teenagers in the car. The 18-wheeler's driver, Ezequiel Garcia, remained in critical condition with burns over 65 percent of his body.
Terrance Hager said, despite shock and disbelief, he's found one comfort in the loss of his 17-year-old son.
"I know he's with his mom,'' he said, referring to his wife's death eight years ago. She was killed in a traffic accident involving an 18-wheeler right outside the family's home in Stratford, 30 minutes north of Dumas near the Oklahoma border.
The teens' deaths have affected families throughout the Texas Panhandle, a local official said Tuesday.
"It's had a big effect on the whole area, and I think it always seems more tragic when you have a loss of life when people are so young,'' said Dr. David Bonner, the mayor pro tem of Dumas.
Two of the teens were sisters from Dumas, a ranching and farming town of about 15,000. The others were from a nearby small town.
The collision occurred Sunday, about 45 miles north of Amarillo. Preliminary reports indicate that alcohol was not a factor and an investigation is ongoing, authorities said.
Killed were Jacob Paul Stipe, 16, of Sunray, Hager and Christopher Lee Moore, both 17 and from Sunray, and October Dawn Roys, 17, and her younger sister, Elizabeth Kay Roys, 15.
According to a report on the Ohio crash released Tuesday, the 19-year-old driver of an allegedly stolen SUV that plunged into water and killed six of the eight people inside did not have a current driver's license. Two teens who survived the crash told police the woman was speeding and driving recklessly before Sunday's accident.
The Indiana wreck happened after six students off from school to attend a Future Farmers of America event at a rural church left the event. Three died at the scene and three others were injured. Police believe both drivers ran a four-way stop, with a Dodge truck hitting a smaller Ford F-250 broadside.