Typhoons are severe weather conditions with heavy rain and strong winds. Tree branches are broken; power poles are blown over. Power outages are quite common. Below are some hits on how to be ready when a typhoon passes by or over Okinawa.
Preparing for a Typhoon
Have enough Food & Water for a few days
Have canned and packaged foods for two days (buy food which can be opened by hand)
Charge all your devices (Phones / iPad / game consoles / flashlights)
Clear your balcony / tie down items that can fly in the wind
Make a batch of rice. Easy go to for quick onigiris.