It has been three weeks. Just from my time as a fireman in brackish water tidewater environments, the usual summer time to float a human body (decay gases build up and add buoyancy) is 3 to 5 days. Depending on the estuary, some places are more likely for those bodies to be found. Some never are, but often they are either on shore or close. Most notably, William Colby's body was found just a few days after his disappearance, just about 300 yards from where a (former SEAL) friend predicted, within a day of his prediction. I am familiar with the waters where Colby's body was found, and grew up on that river. He was hardly the first to be found in that area, the currents and shoreline seem to collect bodies.
My point, though, is that victims of the fire who drowned are likely to be mostly intact in the torso, and should have floated away on the local currents. Some may have been trapped by debris, but I would expect from accounts only a few, at most will be found.
The time to look was two to two and a half weeks ago, on the beaches, any inlets, tide pools and up in rocks, and out in the nearshore water, provided local scavengers hadn't degraded the integrity of the remains.
I hope I am wrong, and that many more families are provided with answers, but find it unlikely that badly burned human remains would end up in the harbor without help. You don't burn neck deep in water. If you are burned to the point of being unrecognizable, you aren't likely to be going anywhere much.
