I think it is more due to the potential for creek and river flooding, particularly to the north. For example, the Passaic near Pine Brook and Morristown in Jersey has been under a flood warning since Ida -
And if that line moves as slowly as it has been, any training would just exasperate the flashier creeks. Plus you have people who were impacted by tornadoes last week with obliterated and/or damaged homes and I expect that if any cells pop up with some gusty winds, those can take down any trees that made it through Ida. I have heard (at least on KYW and from the NWS AFD) that it wasn't going to be anything like last week but because the ground is so saturated, it might not take much to overwhelm an area. I even heard that here in Philly, PennDOT literally pumped out 30 million gallons of water out of what I dub the "Vine Street Expressway Canal", in a couple days, so thankfully they got that out of the way.