Yes, it's a serious storm...
I think it's a bad idea to go to Las Vegas. Looting can quickly become a problem in such conditions. So, one should rather get organized instead.
Move things in a safe upper room. Keep the car in a safe place and fueled up. If you have a planta (generator) have fuel NOW. Have cash on hand in the house as well as food, drinking water and flashlights and other standalone lighting systems ready.
Keep in mind, most expat's home are CBS construction with a concrete roof, not a feature often found in US residences. Wind will in most cases not be a major issue to such structures, yet, water seems to be the most common problem in this country for the lack of planning and appropriate drainage. If your home is safe, you may want to consider offering shelter to your local friends and employees which may not be as privileged.
Then again, to caution against giving appropriate attention to a storm that size just because the last one did not meet expectation is not real science either. It is really a perfect storm and it has plenty of room to grow if it don't hit us... Florida could be at a much worse risk.
... J-D.