Brutal heatwaves and submerged cities: what a 3C world would look like

Climate scientists have told the Guardian they expect catastrophic levels of global heating. Here's what that would mean for the planet

• World is on edge of climate abyss, UN warns
• Climate scientists expect global heating to blast past 1.5C target

Global heating is likely to soar past internationally agreed limits, according to a Guardian survey of hundreds of leading climate experts, bringing catastrophic heatwaves, floods and storms.

Only 6% of the respondents thought the 1.5C limit could be achieved, and this would require extraordinarily fast, radical action to halt and reverse the world's rising emissions from fossil fuel burning.