Expert warns typhoon may trigger tornado-like winds

A Japanese typhoon expert says the public should be on maximum alert as Typhoon Nanmadol could trigger tornado-like violent winds, which may last for hours.

Nagoya University Professor Tsuboki Kazuhisa said Nanmadol was strong enough at one time to be called a "super typhoon" but later weakened. He cautioned however that the typhoon may still make landfall with an unprecedented level of power.

The professor urged people in areas hit by violent winds to stay away from windows to ensure their safety.

He called on people in northern Kyushu to evacuate before the winds become violent.

He said areas far from the typhoon, including the Tokai and Kanto regions, may be hit with heavy rain as well.