The sawyer beetles are secondary insects. They prefer weakened or recently dead trees. I am guessing that their population built up in the trunks of the damaged trees and now they are attacking the other live but probably weakened trees nearby. There should also be some smaller beetles - Ips - involved as well. Debarking the dead trees will prevent further egg-laying attacks, but I think those trees have probably been thoroughly colonized. We're not sure if there are any insecticides labeled for this use. The problem is that the emerging insects only chew to escape the tree, and unless the insecticide is quick acting, they may initiate their attacks on adjacent trees before they die.

If you have a good site for pine, and it seems to be based on height growth vs. age, the insect population cannot sustain itself in vigorous trees. A few of the storm-damaged trees may die, but then the outbreak will end. If you want to be sure, and if it is not too big of a job, pile the dead trees, especially those that were attacked this year, and burn them over the winter to kill the eggs and larvae that will emerge next year.

For more information see: Pine Sawyer Beetles.