Tropical Storm Matmo has just revived itself after travelling about 1,800km (1,118 miles) overland. This is an unusual, but not unique, event.
Matmo was formed in the Philippine Sea, the birthplace of so many tropical cyclones, on October 24. It formally became a tropical storm in the South China Sea on October 30, after having enhanced the rain over the central Philippines, causing floods.
As a tropical storm, it continued west onto the coast of Vietnam, south of Qui Nhon, making landfall on October 31. At that point, winds were recorded at 112 kilometres per hour (70mph) and 200 millimetres (7.87 inches) of rain fell on the city.
Then came the westward journey overland that normally destroys any tropical cyclone. The fuel for any revolving