Parents of kids who attend Skyview High will be notified Sunday whether their children will go to school Monday.
Billings School District 2 Superintendent Jack Copps said crews will spend the weekend repairing the power outage that forced the closing of the Heights school on Thursday.
Work on fixing the outage stalled Friday as crews waited for parts. There is one electrical breaker at Skyview for "very, very high voltage," Copps said, and there isn't a new replacement available. A used breaker was located in California and was being shipped to Billings on Friday.
It will be Sunday before that breaker is installed and crews can work to identify the problem.
"The situation is grave because the switch is simply not readily available on the market, and without the switch working, we can't identify the source of what's damaging the system," he said.
Once the source of the problem is located, it has to be either fixed or disconnected from the electrical system. If the source is essential and can't be disconnected from the system, the system has to stay down until a fix is found.
An engineer from Seattle flew into Billings on Friday, and other local electricians, engineers and crews from NorthWestern Energy and Montana-Dakota Utilities are helping, Copps said.
Skyview power went out Thursday around 10 a.m. A generator is being used to keep areas of the school warm so that the recent cold weather doesn't cause problems.
"Critical areas are being kept warm enough to make sure it won't freeze up there," Copps said. "But we can't maintain a temperature comfortable enough for learning."
Parents will be notified Sunday by the district's automated calling system.
District officials are looking at options for students and teachers if the problem is not fixed by Monday. If Skyview can't open on Tuesday, the school's 1,500 students will have to go to West and Senior.
"We want to get kids back in the classroom," Copps said. "If we can't get this fixed, we're going to have to figure out how to accommodate all of the high school students in two high schools instead of three."