Is there an important dignitary visiting your town?
Years ago, a similar thing happened in Colorado Springs. Garage doors opening or not opening for no apparent reason. There was some sort of meeting of heads of state and the secret service set up some sort of electromagnetic monitoring of some kind. I don't remember the details, and it is late here, and bedtime. I believe I posted on the HabitableZone That Was at the time. Might be worth looking into.