I lived in Hilo, very glad I'm not still there for this. Most of the time the waves were coming from the West or from the Southeast while I lived there, so it was never much of a problem in Hilo. But coming from the Northeast? Hilo bay could get hit pretty hard.
The main issue is that the waves that hit Hawaii from the West or Southeast are usually a backlash as opposed to direct force based on the tectonic movements direction. So they were reduced force tsunamis. Most of that force usually was directed at the Andes Mountains or Japan and southeast Asia. This time the force is directed towards Hawaii directly. They are estimating 8 footers. Which means an 8 foot wall of water that will keep on coming. Probably will be minimal loss of life but there could be significant property damage. Hell my workplace might be totally trashed. It is on the Nort side of the Island just several hundred yards from Hanolei bay. Flat ground too. Not good.
There are several aftershocks too so this tsumani could last days. Which would make it much more damaging and potentially deadly.
@Blackhand, ain't it a B? How many tsunami are we gonna get in a couple years?! At least the last couple were very minor for us. This one may be worse. Hell the entire drug scene on Kauai is mostly based on the North so I suppose it will do some good/bad.