ANN ARBOR, Mich. — Powerful storms ripped through parts of Michigan overnight Tuesday into Wednesday morning, damaging two ice arenas and other structures, and uprooting trees near the University of Michigan’s main campus.

National Weather Service crews were surveying damage in places including Ann Arbor to determine if one or more tornadoes touched down, but none had been confirmed as of Wednesday morning. Instead, the damage appears to have been caused by a line of thunderstorms that moved into Michigan from Iowa, Wisconsin and Illinois, meteorologist Sara Schultz said.

A 70 mph (112.6 kph) wind gust was reported at 1:49 a.m. Wednesday at the university’s football stadium, while gusts of 69 mph (111 kph) and 62 mph (99.7 kph) were reported at Willow Run Airport and Detroit Metropolitan Airport, Schultz said, and another round of strong storms with potentially damaging winds was moving into the area Wednesday from states to the West.

Streets and neighborhoods in many southeastern Michigan communities also were left flooded Wednesday.

Some public school buildings in Ann Arbor suffered structural damage and many lost power. “Safe passage for walkers and buses is compromised across much of the city due to downed power lines, flooding, water main breaks, gas leaks, and felled trees and debris,” the district said Wednesday on its Facebook page.

District schools and offices were closed Wednesday due to what officials say is a fiber outage impacting fire, phone and camera systems, and building access. It wasn’t immediately clear if the fiber outage is related to the storm.

Ann Arbor Mayor Christopher Taylor said structural engineers were assessing damage to a wall at the city’s Veterans Memorial Park Ice Arena. Part of the roof was torn from the university’s Yost Ice Arena.

Two blocks from where utility workers were dealing with the twisted pieces of metal littering the ground outside Yost, Seungjun Lee was feeling fortunate. A hulking tree outside the rented home he shares with six others barely missed his upstairs bedroom when the storm uprooted it.

“If the tree fell down a couple more feet, I would not be standing here,” said Lee, a 20-year-old junior at U-M. “I’d be in the hospital. So, I’m feeling very lucky that … the roof stopped it.”

Lee and his roommates were awakened by a siren, then an alert blasted from their phones between 1 a.m. and 2 a.m., urging them to take shelter.

“As soon as I came out, everyone else was coming out of their rooms and everyone’s like, ‘What’s going on? This is crazy,’” said Lee, of Ridgewood, New Jersey. “And then we looked out the window: This tree just fell down. So, we’re like, ‘Oh, crap.’”

A friend across the street then walked over to check in.

“He was like, ‘Did you hear about Yost?’ We went, ‘No.’ We were worried about our house. So, we walked over and we checked it out and we were like, ‘That’s crazy,’” said Sam Zaruba, a 20-year-old junior from Grand Rapids, Michigan.

As for classes on Wednesday, Zaruba said he’s not going. But roommate Gautam Nigam, a 21-year-old junior, also from Grand Rapids, has to.

“I have a final presentation later today,” he said.

The storms dumped as much as 2.5 inches (6.3 cms) of rain across parts of southeastern Michigan, bringing flood watches to a big chunk of the eastern Lower Peninsula, southeastern Michigan, northern Indiana and northwestern Ohio.

An evacuation notice was issued late Tuesday to low areas in northeastern Michigan’s Cheboygan County following a levee breach in the Little Black River watershed. The breach, in an area northwest of Cheboygan and west of Lake Huron, is not related to efforts to force flow from the Cheboygan Dam toward the lake as water continues rising following days of rainfall and winter snow melt, the county’s emergency management office said on its Facebook page.