Authorities urge evacuations in Kyushu before arrival of storm that could cause flooding, landslides and collapse of houses

Two million people in Japan have been told to seek shelter before the arrival of Typhoon Nanmadol, the national broadcaster, NHK, said, as the weather agency issued a rare “special warning” about the powerful storm.

NHK, which compiles alerts issued by local authorities, said level four evacuation instructions – the second highest – were in place for people in Kagoshima, Kumamoto and Miyazaki in the southern Kyushu region.