According to the National Fire Protection Association, while only 32 percent of home heating fires involve space heaters, space heaters are involved in 79 percent of home heating fire deaths.
Heating equipment continues to be the second leading cause of home fires behind cooking and the second leading cause of home fire deaths behind smoking. As temperatures drop, if you are using a space heater to warm up, please be sure to plug all space heaters directly into a wall outlet and always turn it off when leaving the room or going to bed.
You will also want to establish a 3-foot kid and pet-free zone around the heater, and never put a space heater in a child’s room. Finally, keep your space heaters at least 3 feet away from combustible materials like furniture, bedding, and curtains.
Here is more information on winter heating and space heaters. https://www.nfpa.org/public-education/by-topic/top-causes-of-fire/heating