As winter intensifies across North India, space heaters are being identified as 'silent killers' responsible for a tragic surge in deaths. Recent incidents span from urban flats in Delhi to rural villages in Bihar and hamlets in Kashmir, affecting entire families. The primary culprits are carbon monoxide (CO) poisoning, asphyxiation, and heater-related fires, often stemming from improper use in poorly ventilated rooms. Medical experts emphasize that carbon monoxide is particularly dangerous because it is a colorless, odorless, and tasteless gas, making it undetectable to victims until it's too late. Heating devices, whether electric or traditional coal-based braziers ('angeethis'), consume oxygen and release toxic gases like CO and carbon dioxide in enclosed spaces. Symptoms such as dizziness, headaches, and fatigue can precede unconsciousness and death without warning. A retrospective study by AIIMS New Delhi over 15 years highlighted that 95% of CO fatalities occurred during winter, with coal-burning vessels in unventilated spaces being the leading cause. Beyond CO poisoning, doctors also warn about other health risks. Prolonged heater use significantly depletes moisture from the air, leading to dry nose, throat, and skin, which can exacerbate respiratory conditions like asthma and allergies, and in severe cases, cause internal bleeding in the brain. To mitigate these dangers, experts strongly advise never closing all doors and windows when a heater or brazier is in use, avoiding leaving heaters on overnight in closed rooms, and placing a pot of water in the room to maintain humidity. The pervasive nature of these incidents underscores a critical public health and safety concern across India during the cold season.