Data from 2009 shows that low moisture levels in vegetation, measured as vapour pressure deficit, significantly increase the likelihood of urban wildfires when vegetation becomes dry.

Professor Guillermo Rein from Imperial College explains that dry weather over ten days significantly increases fire risk by drying out vegetation, making it highly flammable even with small sparks.

Researchers at Imperial College London have developed the concept of 'firewaves' and warn that extended dry periods can lead to multiple simultaneous fires in urban areas, potentially overwhelming emergency services.

In response, the London Fire Brigade has invested in new technologies such as drones and off-road vehicles to improve wildfire detection, response, and the creation of firebreaks to contain fires.

The fire brigade's proactive measures aim to better prepare for the increasing threat of urban wildfires driven by climate change and the phenomenon of 'firewaves'.

Cities across the UK, including London and Edinburgh, are increasingly vulnerable to 'firewaves,' a new phenomenon characterized by multiple urban wildfires triggered by prolonged hot, dry weather, which is becoming more common due to climate change.

The 2022 heatwave in London saw several simultaneous fires, including a major blaze in Wennington that destroyed homes, highlighting how extended dry conditions can lead to large-scale urban wildfires.

Experts suggest redefining heatwaves as 'firewaves' to better reflect the wildfire risks in cities and to improve public safety messaging, with the Met Office being asked to consider adopting this terminology.

London experienced its busiest day for fires since World War II during a record-breaking heatwave in 2022, with multiple fires destroying homes and forcing evacuations, exemplifying the danger of 'firewaves'.

The research indicates that the Met Office should use the term 'firewave' to more effectively communicate the heightened wildfire risk during heatwaves in urban environments.