The neighbor behind us has a couple of dead trees. One of them lost out to high winds and broke about 10 feet off the ground, following towards us and across the fence.
Luckily the damage was minor -- two fence pickets had some damage at the top, and a lot of dead limbs. Cleaning up the dead wood and replacing the two pickets fixes the problem. About $5 for the two pickets (rough cedar, dog-eared, 1x6 six-foot long) at Home Depot.