They all just went off! No reason. At least my kids woke up. They won't go off though. They are hard wired, so we shut the breaker. They still went off, so we took the batteries out. They were still chirping for about a half hour. husband said the power drained quite a bit and a huge gust of wind hit te house, then they all started going off. Mighty Mouse was already freaked out with the "beep beep thing" being in his room. Now, he's really going to be freaked. So, it's 2 in the am and I've had about three hours of sleep. Not likely to go back to sleep without an Ambien, which I'm nervous about taking, now, since all of our alarms, except for ONE battery operated one, are disassembled in the garage. Thanks for the whine.