So one thing I've noticed with the Mesh deployments I've seen, is no real use of in-line surge supression. Not surge supression at the power source (UPS) but surge supression on the cat5 cable itself. They make these devices that go inline with the ethernet cable to supress the line itself.
Anyhow, are you having problems with your power brick? If the AP is dead, and it came from the power, I'd think your brick would die too (but I could be wrong).
However, is it possible you are picking up the voltage on the line? Like maybe in the ground, or it runs along side other high-voltage cables...
Maybe cisco doesn't "allow" (support) this use of surge supression on the cat5 cable though? Since they make you buy their cat5 cable on the 1510's, it probably isn't the best idea to cut the cable and splice it into a surge supressor....
Anyhow, back to your problem, if your power brick is surviving, maybe the brick is causing the problem. Maybe the brick is the problem and that it is generating/passing the power surge in the electrical storm (which still could be fixed with inline surge supression on the cat5 cable), but it may be a good idea to replace the power injector if possible.....
