"Recognition", Joanne Steinwachs

SS Talebones Spring 2006 - science fiction
Forty years after catastrophe brought on by an alien invasion, elderly Mariah Cho ponders the changes she's seen. Swarm of flying things called Furies destroyed buildings, people and civilization. The survivors fear to congregate. Mariah lives with her deaf teenage grandson Soren. They like enjoy making wonderful things for each other. Soren dares to build arches. A new sort of alien is seen.

An interesting, post-apocalypse story. And it's set in my home state, Colorado.