Ten fire engines and around 70 firefighters were called to a grass fire on Mollison Avenue in Enfield.
Around five hectares of grass and shrubland were damaged by the fire. There were no reports of any injuries.
A London Fire Brigade spokesperson said: "High temperatures are forecast this week and the ground is extremely dry.
"We’re urging people to take extra care and help us prevent fires on open land this summer.
“Make sure rubbish, especially glass, is safely thrown away and cigarettes are always properly disposed of.
"Grass will be tinder dry after periods of hot weather, so please don’t have barbecues in parks and public spaces."
The Brigade's 999 Control Officers took 14 calls to the blaze.
The Brigade was called at 1629 and the fire was under control by 1859. Fire crews from Edmonton, Chingford, Enfield, Walthamstow and surrounding fire stations were at the scene.