20 fire engines and more than 120 firefighters responded to a fire at an industrial estate on Alfreds Way in Barking, the London Fire Brigade (LFB) has said in a statement.
According to the LFB, a single-storey warehouse and part of an adjoining warehouse were on fire when the firefighters arrived at the scene.
The firefighters received the call at 18:33 local time (17:33 GMT) and the blaze was under control by 00:57 on 16 May (23:57 GMT, 15 May).
Photos of the incident have been posted on the LFB's official account on Twitter.