Even the general in charge of Pearl Harbor at the time didn't know that there was an eminent threat because he didn't receive intel that was vital to preparing for an eminent attack. My FIL was there that day, and saw the planes overhead and initially had no idea what was happening until bombs began falling. He and his work buddies were sipping on their morning cup of coffee getting ready to do a normal days work.
He rarely talked much about what he witnessed that day, but he did tell family about having to cut holes in ship hulls to try to save trapped shipmates, and fishing the injured and dead out of the water. He was a crew member of the Arizona, but not that day. He had finished his enlistment and been discharged from the navy 2 weeks before the attack and was still working in the shipyard as an electrical engineer.
I totally agree!