SPRINGFIELD — Heavy snow this week in Eugene-Springfield wreaked havoc on trees, causing them to fall on houses, cars and businesses — and even block highways.

It also weighed heavy on many area roofs, including at Thurston High School, where the roof of the small gym partially collapsed Wednesday.

Springfield School District spokeswoman Jen McCulley said an alert custodian Wednesday noticed a large beam in the small gym of the school had started to crack.

As maintenance and facilities crews responded to assess the damage, the beam of the gym roof gave way, McCulley said.

There were no injuries.

On Thursday, crews were at the school where access to the gymnasiums mostly was blocked off by pink caution tape. The small gym, located adjacent to the larger gym, was built in 1970 and is about 18,000 square feet.

McCulley said it was too early to tell when the roof may be able to be repaired.

"We don't have a timeline yet," she said. "There's still snow on the roof and it's just not stable, so when it will be fixed is still unclear."

District officials announced late Thursday afternoon that all Springfield schools will remain closed Friday.

A board meeting has been scheduled for Friday so members can declare the issue an emergency and be able to use district funds to fix it, according to a release issued by district staff.

With the small gym being inaccessible for the foreseeable future, McCulley said classes and other activities that normally take place in the gym will have to be moved.

"We won't be able to hold some of our scheduled activities this coming weekend, or assemblies or use that space for classes," she said. "But the good news is that the structure is pretty much by itself, so should it fall, in theory, it would only be that one pod that comes down."

In an effort to make sure there were no other potential safety concerns, the district teamed up with a contractor and structural engineers to closely assess Thurston and other schools in the district for any issues.

"Right now we've just turned our attention to making sure all our schools are safe for kiddos," McCulley said. "There's no indication of any other problems — we just want to be safe."

Alisha Roemeling on Twitter @alisharoemeling. Email alisha.roemeling@registerguard.com.