Fire and rescue crews from Newcastle and Sandyford were called to a fire on Hardingswood Road in Kidsgrove.
"We would also urge people to make sure they have working smoke alarms fitted in their homes, including caravans."
Risk Reduction Manager, Glynn Luznyj
The call was received at 4.35am reporting the incident which involved a caravan that was well alight.
The three occupants that were inside the caravan when the fire started made their way to safety by climbing through the side window.
Firefighters used two hose reel jets to extinguish the blaze.
The fire had started due to a portable electric heater that had been placed too close to bedding causing it to overheat and catch fire.
Risk Reduction Manager, Glynn Luznyj said: "We advise people to make sure they do not place electric heaters too close to combustible items, such as bedding.
"It is very easy for such items to overheat and catch fire as this incident highlights.
"We would also urge people to make sure they have working smoke alarms fitted in their homes, including caravans. Luckily, the occupants were alerted to the fire due to one of them feeling the heat from the fire on his foot.
"If this hadn’t been the case we could have been reporting a far more serious incident."
All three occupants were taken to the University Hospital of North Staffordshire.
The incident was closed at 6.55am.
The cause of the fire is believed to be accidental.