China's top leaders have urged "all-out efforts" to treat those injured in a car attack in southern China, one of the deadliest incidents in the country's recent history.

US climate envoy John Podesta has urged governments to keep faith in the country's promise to combat global warming, saying Donald Trump can slow, not stop, the transition from fossil fuels when he returns as President in January.

An adult is dead and a child injured after a water tanker crashed through a fence at a small-town Victoria kindergarten.