Children around the world will face a sharp jump in heatwaves, floods and droughts in their lives compared to their grandparents, researchers said on Monday, with teenagers from Nepal to Australia urging leaders not to turn a blind eye.

Children will, on average, suffer seven times more heatwaves and nearly three times more droughts, floods and crop failures due to fast-accelerating climate change, found a report from aid agency Save the Children.

Those in low- to middle-income countries will bear the brunt, with Afghan children likely to endure up to 18 times as many heatwaves as their elders, and children in Mali likely to live through up to 10 times more crop failures.