Back in the Fall my building fire alarm kept going off almost bi-weekly for a couple months. It was horribly annoying & always seemed to happen at night. Actually to think of it the first night Sylvie came home the fire alarm went off. She huffs up when the alarm goes off. What I've done it pick her up in the hat she sleeps in & hold her until she calms down. She remains a little cranky but does stop huffing which is the big thing for me. Sylvie seems to calm best when I hold her against my chest with some gentle pressure (like a gentle hug).