Half of the world’s children are exposed to at least three overlapping climate hazards threatening their health, education and survival, according to a Unicef report.

Globally, children face increasing threats from heatwaves, storms, floods and droughts as the climate crisis worsens, with more than one billion facing at least three of these at once.

Striking footage released by the UN agency shows children in Papua New Guinea swimming across a crocodile-filled river to get to school after a vital footbridge washed away during heavy rains and was not replaced.