NYC may be hit with very strong winds and a possible hurricane on Shemini Atzeret and Simchat Torah, and this poses extreme danger to people living near things like sukkahs, which can easily become missiles that slam through windows and windshields, and strike pedestrians. Here's NYC's very understated warning.
What you should do is take down your sukkahs and secure them very well before Shemini Atzeret and rely on the halakhic opinions that say you don't need to sit in a sukkah after Hoshana Rabba. Better to do that then risk killing someone.
You should also prepare an emergency bag full of water, food, medicine, a change or two of clothing and important things like copies of your insurance policies in case you have to flee, and arrange a safe meeting place where family and friends will know to look for you if you have to seek shelter.
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[Hat Tip: Kenneth Gray.]