Khan’s announcement comes after a huge number of fires raged across the capital last week caused by the record high temperatures, prompting London Fire Brigade (LFB) to declare a major incident.

“The extreme temperatures and fires that raged across the capital last week laid bare how vulnerable London is to the effects of climate change, which is why today I’ve pledged a further £3.1m for a mass tree-planting package to help limit the affects of the climate emergency and the ecological crisis,” Khan said.

He added: “These additional street trees and improvements to green spaces are targeted in areas where they’re most needed and will improve resilience of neighbourhoods in our city.”

London remains at immediate risk of wildfires because of tinder dry grass, with the LFB warning that any small sparks can start a serious fire.

Meanwhile, the Environment Agency has warned that more prolonged dry weather in the coming weeks could push London and the southeast...