This is the dramatic moment a bouncy castle was blown down a street during a violent storm in China.

Footage shows the colourful inflatable being swept away by strong winds in Nanning, Guangxi, on August 17, as heavy rain lashed the area.

A tornado was also reported in the city around 9:54 pm local time, with witnesses saying the freak weather lasted for around five minutes and caused damage to outdoor setups.

The Nanning Meteorological Bureau reported that the sudden event was triggered by a combination of a tropical depression over the South China Sea and local atmospheric conditions.

Officials said the region is expected to remain under the influence of the tropical system over the coming days, and urged residents to stay alert.