The great storms that hit the coast start as innocent circling disturbances hundreds -- even thousands -- of miles out to sea. As they travel aimlessly over water warmed by the summer sun, they are carried westward by the trade winds.

• 袭击海岸的强大风暴在数百英里、甚至数千英里的远海区产生，起初是无害的旋转风暴，当它们在水面上被夏日加热而茫然驱动时，便被季风推向西方。