I am sure you did your best to protect your plants from the weeklong overnight freezes we just experienced in Northern California....and even with covering them and/or watering them, some may be looking pretty sad, damaged or dead. I have a beautiful red Bouganvia and a super beautiful, double-white Angel's Trumpet that aren't looking too good right now! But, before I cut them back, I called my garden center and they told me to hold on and not cut anything back yet!
For many garderners, our first reaction is to get out there,cut-off and prune back any obviously damaged parts of the plant. But the word from the experts is not to. They also recommend that you tell your gardener/yard maintenance people