
Hazards of fire-damaged vehicles: After exposure to high temperatures, the plastic insulation layers of various wiring harnesses will have aged, making them prone to short circuits. In minor cases, this may burn out fuses and electronic control components, while in severe cases, it can lead to spontaneous combustion. In metal heat treatment processes, there is a technique called "annealing." After annealing, the hardness of the metal decreases, making it easier for further processing. A vehicle that has been through a fire essentially undergoes an "annealing" process on its body frame, which reduces the frame's strength. Therefore, fire-damaged vehicles are similar to accident-damaged vehicles in this regard. After a vehicle has been through a fire, the visible damage to plastic components is not the main issue—these can simply be replaced. The real danger lies in the changes to the vehicle's structural strength. Once exposed to fire, the metal's microstructure alters, causing the energy-absorbing zones in collision areas to lose their functionality. In the event of an accident, safety can no longer be guaranteed.

The most direct threat of a burning vehicle is to personal safety, as the heat and thick smoke can be fatal within minutes. I remember two years ago when my neighbor's electric car caught fire, the entire garage was engulfed in black smoke. Firefighters said the burning could release toxic cyanide gas, making it much more dangerous than a gasoline-powered car. The intense fire can also burn through the vehicle's structure, and if the fuel tank explodes, debris can be thrown dozens of meters, damaging surrounding parked cars. Moreover, the burned-out vehicle is a total loss, and the cost of repairing the road surface and cleaning up contaminated soil could be enough to buy a new car. Recently, I saw news about a burning truck on the highway that caused a three-hour traffic jam, blocking even rescue vehicles—truly harmful to both the driver and others.

The economic losses caused by vehicle fires are often underestimated. Beyond the total loss of the vehicle, the cost of cleaning up combustion residues alone is particularly high. I've seen auto repair shops dealing with fire-damaged cars before—the tar produced by burning interior plastics seeps into body crevices, making repair costs even higher than those for accident-damaged vehicles. For electric vehicles, the situation is even more troublesome. Lithium fires exceed temperatures of 1000°C, requiring tons of water for cooling, and specialized qualifications are needed to handle the resulting wastewater. Additionally, if the fire spreads to nearby shops or residences, compensation can easily reach millions. Many car owners haven't purchased spontaneous combustion insurance, ultimately leaving them to bear all the losses themselves—a truly disproportionate outcome.

Environmental hazards in this regard require special attention. The benzene compounds released by burning fuel vehicles are strong carcinogens, while electric vehicle fires can leak heavy metals that contaminate the soil. Last year, after a fire in our residential underground garage, tests revealed that the nickel content in nearby groundwater exceeded the standard by eight times. Not to mention the PM2.5 and black carbon particles generated by combustion, which can spread with the wind and affect half the urban area. The foam agents used for firefighting contain fluorides, which enter the drainage system and disrupt the ecological chain. Therefore, current environmental regulations mandate that fire-damaged vehicles must be handled by professional institutions, as ordinary repair shops are not qualified to take them on.

Secondary disasters caused by fires are actually the most deadly. Thick smoke can instantly blind drivers, leading to rear-end collisions on highways every year. One rescue experience left a deep impression on me: after a sedan caught fire, the owner panicked and opened the door, allowing a large amount of oxygen to enter and trigger a violent flare-up. Melted car wiring can also create accidental circuits, electrifying metal components. Even more troublesome is the 'thermal runaway' in electric vehicles—a fire that appears to be extinguished may reignite half an hour later. Firefighters now maintain a 15-meter distance when dealing with electric vehicle fires, fearing sudden eruptions that shoot fireballs.

Psychological trauma is often overlooked. Witnessing one's beloved car burn to a charred skeleton can trigger stress disorders in many people. After a colleague's garage caught fire, he couldn't bring himself to touch the steering wheel for six months. This is especially true for families with children—the smell of smoke alone can trigger uncontrollable crying. The impact also extends to communities—after the last car fire on our street, property values in the entire building dropped. Many automakers are now promoting fire-resistant materials, such as flame-retardant seat covers and ceramic-coated casings, because prevention is always better than cure. Regularly inspecting fuel lines and electrical systems, and avoiding leaving hazardous items like lighters in the car, can truly be lifesaving in critical moments.


