More than 100 firefighters are responding to a major fire in east London that affects a railway embankment and nearby properties. According to the London Fire Brigade, the incident is in Walthamstow, near Vallentin Road, where a significant amount of smoke is produced. The BBC reports the fire affects a house, gardens, and the railway embankment. The Guardian says 25 fire engines and about 125 firefighters are called to the scene, describing the blaze as serious. Other outlets report residents are evacuated and that the fire leads to travel disruption, with local authorities and the public urged to take precautions such as closing windows. Coverage links the incident to disruptions around the Walthamstow railway line area, though the available summaries do not provide further details on the cause. Firefighting efforts are focused on controlling the blaze and managing smoke, while impacts on nearby homes and the rail network are being addressed.