The Future Falls (Gale Women, book 3)
by Tanya Huff
From the publisher:
When Auntie Catherine warns the family of an approaching asteroid, the Gales scramble to keep humans from going the way of the dinosaurs. Fortunately for the world, they’re wielding a guitar and a dragon.
The Gale family can change the world with the charms they cast, which has caused some supernaturally complicated family shenanigans in the past. So when NASA and Doomsday Dan confirm Auntie Catherine’s dire prediction, Charlotte “Charlie” Gale turns to the family for help.