'Summer of simmering': Guterres uses Asean summit to issue climate warning – video

Speaking at the Association of Southeast Asian Nations' summit in Indonesia, the UN secretary general, Antonio Guterres, said 'greater cooperation' was desperately needed on the climate front.

'We have just learned that this past June, July and August were officially the hottest three-month period on record,' Guterres said. 'The so-called dog days of summer are not just barking, they are biting'

• World meteorologists point to vicious cycle' of heatwaves and air pollution