A super typhoon is bearing down on the Japanese island of Okinawa, where both the U.S. Air Force and Marine Corps have bases, and meteorologists say the typhoon is expected to hit the main islands of Japan on Wednesday evening.

According to AccuWeather.com, typhoon Neoguri reached super typhoon strength early Monday local time (Sunday afternoon EDT), making it the first super typhoon of the season.

“Being right of the storm track, Okinawa will likely see the worst impact from the storm Monday night with rainfall rates of 50 mm (2 inches) or greater per hour at times, sustained winds as high as 225 kph (140 mph) with occasional gusts of 290 kph (180 mph),” stated AccuWeather.com Meteorologist Evan Duffey.

Westernmost parts of Okinawa, home to the United States’ Kadena Air Force Base, will be at greatest risk for the strongest and most devastating winds.

Those in the path of the intensifying typhoon are at serious risk and may face evacuation orders.

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