ameliorate, devastation, linger, onslaught, perturb, subsequent
Brad Pitt was perturbed by the lingering devastation in New Orleans almost one year subsequent to the onslaught of Hurricane Katrina. He has been visiting the city to promote a competition to design ecologically sound neighborhoods that will ameliorate conditions for low-income families.
perturb - (verb) to disturb to a great degree
linger - (verb) to leave slowly; to remain while slowly fading out
devastation - (noun) destruction and/or decay
subsequent - (adjective) following
onslaught - (noun) a violent attack; an outpouring
ameliorate - (verb) to improve circumstances in need of change