SOLVED. YA Survival novel where you can't go outside. Spoilers ahead. [s]

[Tres]

[SPOILERS AHEAD] Read the book probably 5 or 6 years ago now, seemed to be modern. The story takes place in a large American city iirc. The premise is that an 'alien invasion' results in people not being able to go outside at all or they'll be vaporized. There are two characters you view the story through, both completely uninvolved with each other. One is a teen guy trying to survive with his dad alone in their home. The other is a younger girl in an office(?) building and parking garage. It's a fairly dark story. The boy's father kills himself to provide more supplies to him, and the girl is in a generally scummy and crime filled building where she has to sneak around unseen. The guy 'meets' a girl across the street and communicates with her by putting notes on the window to read. Their dog is also presumably eaten by a neighbor.

Any help would be appreciated!

[Julia]

Pod by Stephen Wallenfels?

[Tres]

That's the one, thanks so much!