The typhoon is expected to hit southern Kyushu, one of Japan’s southwestern islands, specifically in Kagoshima Prefecture, according to NHK.
“Weather officials have issued an emergency warning for high winds, high waves and storm surge for Kagoshima Prefecture,” NHK reported.
Residents of 965,000 households have been ordered to evacuate the seaside towns of Miyazaki, Kagoshima and Amakusa.
A level five alert, the highest on Japan’s disaster alert scale, was issued to more than 14,000 people in the town of Nishinomote on the island of Kyushu, NHK reported.
“It is possible that this is a record heavy rain and an emergency heavy rain warning will be issued,” the Japan Meteorological Agency (JMA) said.
“The highest level of vigilance is required for rising water levels and flooding of rivers, landslides and flooding of lowlands.”
Ryuta Kurora, a JMA official, warned on Saturday that strong winds could cause houses to collapse. Kurora urged residents to evacuate before the storm hits to escape the risk of landslides and flooding.
Japan Airlines and All Nippon Airways have already canceled at least 335 flights scheduled to depart or arrive at airports in Japan on Sunday, according to NHK.
“The eye of Typhoon Nanmadol is clearly visible in satellite images. The typhoon has been developing rapidly since Friday evening,” NHK reported.