Oh the Humidity!

We keep our windows open at night whenever possible to keep air-conditioning costs down. So the other night we thought nothing of going to bed with basically every window open. We had something that the weathermen call an "upper level low pressure system" come through Iowa. So whatever that means, it brought a lot of fog and water vapor close to the ground. At around 3am, our smoke detectors went off all through the house. (They are all connected to each other through our wiring). I guess all the water in the air had brought the particulate matter in the air to above normal levels causing the alarms to go off. Brett jumped out of bed -freaked me out- and then realizing that it was just the good old Midwestern humidity- I got up, closed all the windows, turned on the AC to dry out the house, and went back to bed.