The London Brigade has urged people to buy takeaway food during the strike if they had been drinking at Christmas events to reduce the threat of kitchen fires.
FBU members have now taken strike action five times in recent months in protest at changes to pensions and their retirement age, which the union argues threatens older firefighters with losing their jobs or having reduced pensions.
The union said firefighters in their late 50s face the prospect of being sacked or seeing their pension reduced by almost half.
More top news
The early-morning operation targeting drug gangs saw 25 suspects arrested and 40 properties searched in Croydon, Wandsworth and Lewisham.
Despite all her success so far, she raps about how she doesn't have all the answers and is trying to figure life out.
British Transport Police officers are investigating the death on the travelator, which is not believed to be suspicious.