Ellicott City, Maryland
Eddison Hermond was last seen helping a woman with a cat escape Ellicott City's floodwaters, police said.
Buildings were toppled and cars were swept away in Ellicott City -- again.
The 15-year-old also wounded the victim's mother before turning the gun on himself, police say.
A look back at the country's most disastrous weather of 2016.
