Why would you want to "clear" your house? Investigating a strange noise (as Frank suggested, by sitting and listening) is one thing, but IMO running towards an obvious threat would be a silly thing to do.
Having said that, I will, however, make my way to the nearest egress point and being that I live on a second floor the windows are not at option. Should hunkering down with my light, my phone (with 911 on the line), and my gun not be feasible I will be making my way to the only door.
"The best diplomat I know is a fully charged phaser bank" - Montgomery Scott