Around 200 people were forced to evacuated a tower block in Kensal Town following a fire on the 27th floor.
London Fire Brigade (LFB) was called to Golborne Road at 9.23pm where firefighters found part of the Trellick Tower alight.
A woman and two children evacuated the flat on the 27th floor, which was badly damaged, before LFB arrived.
There are no reports of any injuries.
LFB had taken over 40 calls over the blaze.
The fire was under control by 10.51pm after crews from North Kensington and surrounding stations attended.
The cause of the fire is under investigation.
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