As a cold snap grips the UK, fire safety experts are warning against a popular winter warmer: microwaveable heat packs. While commonly used for warmth and pain relief, these packs can pose a serious fire hazard if not used correctly.
Jonny Smith, a fire risk assessment expert at Crusader Fire, explained that the packs often contain fillings such as wheat, rice or flax, which can ignite if overheated. Since microwave wattages vary, a safe heating duration in one home could be dangerous in another.
“A few seconds too long, or a bag that has dried out, can lead to a smouldering fire inside a microwave,” Smith said. He also warned that leaving packs on radiators or near curtains can cause accidents.
To stay safe, users should check for damage to seams, lining, and filling. If a bag is split or the filling is exposed, the risk of ignition increases. Never reuse a bag that shows wear, and always follow manufacturer’s instructions.
Smith cautioned that placing a warm bag on bedding, sofas, or chairs can trap heat against flammable material, increasing the fire risk. “People often assume that once they’re in bed, the risk is gone, but that is not the case,” he added.
