Cover the burn in sterile non-stick dressing i.e. one layer of gladwrap, to prevent fluid loss. If patient is conscious and thirsty, give them small amounts of water to drink. Do not give alcohol or stimulants like coffee. Reassure the patient and keep an eye out for symptoms of shock. A fire is a traumatic event, keep an eye on each other as this may be the trigger for someone's weak heart to give out, or their asthma to get out of control.
Heart attack takes out more fire fighters than anything else does.
Be there for each other. Three things are needed to maintain a fire. Fuel - any oxidisable material. Oxidant - usually air or oxygen, but it can be in chemical form. A certain temperature - heat.