A chirping smoke alarm often indicates a low battery. When it happens at night, it could be an environmental issue affecting the device's performance.
If your smoke alarm keeps waking you up for no reason, here's what's going on -- and the maintenance that can stop it.
Tiny Tim's Adventures on MSN

POV: The Fire Alarm Goes Off During Class

Semi truck driver arrested in deadly 10 Freeway crash was in U.S. illegally, DHS says A Massive New Study of 20,000 Adults ...