Two adults and a baby had to be rescued after a fire on the ninth floor of a block of flats in Westcliff.
Crews were called to Balmoral Road last night.
17 people had to be treated for the effects of bresathing in smoke.
Meanwhile a number of people had to be evacuated from their homes after a fire at a house in Braintree.
Firefighters were called to Bailey Bridge Road in the early hours of this morning.