Shannon's volunteer fire brigade has put out a call for people to be careful about where they charge their phones - and for parents to be particularly vigilant.
Often people will charge their phones, tablets, iPads or other devices near their beds, including under pillows or bedding, with the risk of fire if the charger heats up.
While it may be tempting to snuggle up in bed with your device, especially in the colder months, having it plugged in or charging while you do so can be particularly risky.
The brigade says a recent study has shown 53 per cent of children and teenagers charge their devices on their bed or under their pillow, which is extremely dangerous as the heat generated by a charger is then unable to dissipate.
"The likely result is that the pillow/bed will catch fire, placing the child, as well as everyone else in the property, in great danger," the brigade said in a statement.