Lifestyle
6 Signs Your Space Heater Could Start a Fire
By Mike Harper · October 31, 2026
A small space heater can take the chill off a drafty room. Used the wrong way, it can also start a fire.
The National Fire Protection Association says heating equipment is one of the leading causes of home fire deaths. Based on 2020 to 2024 averages, it says space heaters and heating stoves were involved in about 30% of home heating equipment fires but 73% of the deaths from those fires. Nearly half of heating equipment fires happened from December through February, according to the association.
The U.S. Fire Administration reports that home portable heater fires were only 3% of home heating fires but accounted for 41% of fatal heating fires in homes in 2017 to 2019. The U.S. Consumer Product Safety Commission estimates that portable heaters, including electric space heaters, were involved in an average of 1,600 fires a year from 2020 to 2022.
These are the warning signs drawn from safety guidance by those three agencies.
Something that can burn is within 3 feet. The CPSC, the NFPA and the Fire Administration all say to keep at least 3 feet of space between a heater and anything that can catch fire. The CPSC names beds, sofas, curtains, papers and clothes, and says the space applies to the front, sides and rear of the heater. The NFPA says space heaters can be a significant fire hazard when placed too close to flammable materials.
It runs through an extension cord or power strip. The CPSC and the Fire Administration both say to plug a space heater directly into a wall outlet and never into an extension cord or power strip.
The cord, plug or outlet feels hot. The CPSC advises checking often while the heater is running. If the plug, outlet or faceplate is hot, it says to stop using the heater and have a qualified electrician check or replace them. If the cord is hot, it says to disconnect the heater and have it inspected by an authorized repair person. The agency also says not to use an outlet if the heater plug doesn’t fit tightly.
The cord runs under a rug. The CPSC says never to run a heater’s cord under rugs or carpeting, because this can damage the cord and cause it and nearby objects to burn.
It doesn’t shut off if it tips over. The Fire Administration’s heating safety handout says to make sure the heater has an automatic shut-off, so if it tips over, it shuts off. The CPSC says to place a heater on a stable, level surface where it will not be knocked over.
It has no safety certification mark, or it may be damaged or recalled. The Fire Administration says to use only portable heaters from a recognized testing laboratory, and the CPSC says a certified heater will have a safety certification mark. The CPSC also says never to operate a heater you suspect is damaged, to inspect the heater, cord and plug before use, and to check whether your heater has been recalled.
Habits matter as much as the heater itself. The CPSC says never to leave a heater running while unattended or while you are sleeping, and the Fire Administration says to turn it off when you leave the room or go to bed. The CPSC also says to keep electric heaters away from water and never touch one if you are wet. Its winter guidance adds smoke alarms on every level of the home and inside each bedroom, tested every month.
This article is for general information. Follow the manufacturer’s instructions for your heater, and call 911 in a fire. This article was produced with the assistance of AI and fact-checked against the sources cited by LightWave Reports.