Wildfires are raging through the Greek island of Evia amid Greece’s most severe heatwave in 30 years and over in the US, the second largest fire in state history is burning in northern California. "We need to acknowledge just straight up these are climate-induced wildfires,” says California's Governor Gavin Newsom. Meanwhile, heatwaves like the one in Greece, in which temperatures spiked to 45C (113F), are becoming more likely and more extreme because of human-induced climate change. Firefighters continue to tackle these fires as the most up-to-date review into climate change is published later. More than 14,000 scientific papers were reviewed for the report, which looks at how global warming will change the world over the coming decades.

The study by the Intergovernmental Panel on Climate Change - a UN group - will "come with quite a lot of bad news" but there are going to be "nuggets of optimism", says Prof Piers Forster, an expert in climate change from the University of Leeds. According to Richard Black, from non-profit advisory group the Energy and Climate Intelligence Unit, the report will be a “massive wake-up call” to governments. This report comes ahead of the COP26 UN-run summit being held in the UK in November. It is seen as critical moment if climate change is going to be brought under control. One question will be whether  countries have kept their climate change promises. Leaders will meet to try and agree a plan - already aware there have been record-breaking temperatures, raging wildfires and devastating flooding as the climate changes. Research does confirm though that if politicians can stick to holding global temperature increase down to 1.5C, on pre-industrial times, the worst catastrophes can still be avoided, says our environment analyst Roger Harrabin.