Fire chiefs have renewed their warnings over summer wildfires in London after a blaze led to partial closures on the M25.
The London Fire Brigade urged people to act responsibly during the hot weather, as temperatures are expected to exceed 32C (90F) over the weekend.
It comes after ten fire engines and 70 firefighters battled a wildfire at Rammey Marsh near Mollison Avenue, Enfield on Tuesday afternoon.
The LFB received the first of ten calls by members of the public just after 3.30pm and rounded up crews from Enfield, Edmonton and Barnet.
A wildfire response vehicle featuring “misting lance technology”, one of four being trialled by the LFB this summer, was dispatched to the scene.
Ten fire engines and around 70 firefighters are tackling a grass fire near Mollison Avenue in #Enfield.
— London Fire Brigade (@LondonFire) June 24, 2025
Around ten hectares of shrubland and grassland is alight.
A wildfire response vehicle has been deployed to help extinguish the fire.
More info - https://t.co/3Mg1cE76W6 pic.twitter.com/wrsU7KXabR
Firefighters from Hertfordshire Fire & Rescue Service and Essex County Fire & Rescue Service also attended.
Around seven hectares of shrubland was alight, resulting in two lanes of the M25 being shut between Junctions 25 and Junction 26 at Waltham Abbey.
The cause of the fire, which was extinguished shortly after 6pm, is not yet known.
But the LFB said common causes for fires can include the use of disposable barbecues, unsafe disposal of smoking materials and discarded rubbish.
Between January 2022 and May 2025, the LFB recorded more than 330 callouts, 17 of which resulted in casualties, where a barbecue was recorded as a cause or contributing factor to a blaze.
The force also urged landowners and local authorities to take action now to help protect communities by cutting back or ploughing grass, especially where it lies close to properties.
A spokesman said: “If you’re planning to enjoy the summer sunshine in a park or other open spaces, please don’t take a disposable BBQ with you. They pose a significant fire risk as the heat can be retained for many hours, even after a barbecue has been put out.
"It’s also important to make sure that smoking materials are discarded of properly and either dispose of your rubbish in the appropriate bins or take it home with you if none are available.”
Firefighters have responded to more than 500 wildfires across England and Wales this year so far, the National Fire Chiefs Council said, as temperatures continue to rise.
London is set to bask in 32C (91F) heat on Saturday and Sunday, with scorching days now tipped to stretch into mid-July, according to the Met Office.
