Worried about the sky falling? The Near-Earth Object program at NASA tracks asteroids approaching the Earth. Just check it frequently or when you get that queasy an-asteroid-is-going-to-crush-my-house-and-end-civilization-as-I-know-it feeling.
Luckily, the only asteroid with a Torino scale rating of greater than 0 is 1997 XR2. It may potentially impact Earth on June 1, 2101 though its rating of 1 would indicate that we’re safe.