We had an election in the mid 1980’s in Pennsylvania. Among other things, an election for a neighboring State Senate seat. The Senate district encompassed portions of Lackawanna County, but mostly ran through strong Republican areas in Wyoming County, Susquehanna County and elsewhere.
There was an early season rain/sleet event that day.
The district was considered heavily Republican. That night the results came in slowly and by 11:00 pm the Democrat was ahead by about 2 points. The Republican candidate actually conceded the race, the Democrat claimed victory and everybody went to bed.
What nobody realized is that there had been a power failure in the small town of Montrose, the county seat. The power was restored at about 1 am and the results compiled and conveyed. The Republican won 54 to 46 percent.
I believe they actually woke both candidates up to tell them the news.