When and why electric cars catch fire

Electric car fires are rare, but when they happen, they draw intense attention

Electric cars are often in the news for catching fire. While they can be prone to fire due to mishandling and other conditions, that does not mean we label these events as regular.

In the overall vehicle fleet, mechanical failures are the leading factor in fires, with electrical faults also common; in EVs, short circuits can be involved when batteries are damaged.

Battery damage from collisions can trigger dangerous chain reactions

A collision that damages the battery pack is one of the most common causes of EV fires. When lithium-ion cells are punctured or crushed, they may short-circuit internally. 

This can lead to a phenomenon known as thermal runaway, where one overheating cell causes adjacent cells to heat up as well, potentially resulting in a fire that spreads rapidly and becomes difficult to extinguish.

Charging-related fires often come from poor management or equipment failure

Fires during or shortly after charging are typically linked to faulty or non-certified charging equipment or failures in the charging/battery-management system; using manufacturer-approved EVSE and proper wiring is essential.

If the system fails to regulate this process, whether due to software glitches, hardware defects, or outdated firmware, it can lead to overheating, internal battery damage, and in some cases, spontaneous ignition.

Even parked electric cars can catch fire hours after use

It may sound surprising, but electric vehicles can catch fire while sitting idle, sometimes hours or even days after being driven or charged. These incidents are typically caused by lingering battery stress, manufacturing defects, or internal shorts. 

Without warning signs, a parked EV may ignite spontaneously, catching owners off guard and raising concerns about battery stability and long-term safety.

What is thermal runaway, and why is it so dangerous in EVs?

Thermal runaway is a chain reaction within lithium-ion batteries that leads to uncontrollable heating and potentially results in fire or explosion. Once one cell overheats, neighboring cells can overheat too, creating a cascading effect. 

This process is hazardous in electric cars because battery packs contain hundreds or thousands of tightly packed cells, allowing a minor problem to escalate rapidly.

Fires involving lithium-ion batteries burn hotter and longer than gasoline

When an electric vehicle catches fire, it often burns hotter, longer, and more intensely than a gasoline fire. Lithium-ion batteries contain chemical energy that releases extreme heat when compromised. 

Responders often use thousands of gallons, typically around 3,000–8,000 gallons, to cool battery packs and monitor for re-ignition.

Manufacturing defects can hide deep inside EV batteries for years

Not all fires are caused by crashes or charging. Sometimes, tiny defects in the battery’s internal structure, such as contaminants, poor insulation, or flawed assembly, can go unnoticed for years. 

These flaws may create weak spots within the battery pack that, under the right conditions, can trigger a fire without warning. Manufacturers have recalled EV models in the past due to hidden defects just like these.

Water damage, especially from saltwater, increases fire risk significantly

Exposure to water, particularly saltwater, can create pathways for short circuits within electric car batteries. After floods or coastal storm surges, fire departments have reported delayed EV fires caused by residual saltwater inside the battery pack. 

This is especially dangerous after natural disasters, where submerged electric cars may appear fine at first but ignite hours or even days later due to corrosion and shorts.

Electric vehicle fires are less frequent than gas car fires overall

Multiple national datasets suggest that EVs do not ignite more often than ICE vehicles, and in some markets, they appear less frequently. For example, in Sweden for 2022–23, there were ~.8 fires per 100,000 electric or hybrid passenger cars, versus 68 per 100,000 across the overall fleet.

However, agencies caution that methods and exposure differ, so direct comparisons should be made carefully.

Hybrid vehicles have the highest fire risk of all powertrains

Interestingly, hybrid vehicles, not gas or electric cars, are statistically most likely to catch fire. That’s because hybrids combine combustion engines and battery systems, meaning they carry risks from both technologies. 

The fire potential is higher if a hybrid’s engine overheats or the battery malfunctions. For this reason, some experts consider hybrids to have the most complex fire risks of any modern vehicle type.

Improper DIY repairs or modifications can create significant hazards

As electric vehicles become more common, some owners attempt repairs or upgrades at home. However, lithium-ion batteries are susceptible to tampering. 

Removing or replacing battery modules without proper training can result in short circuits or unstable voltage conditions. Even minor modifications, like incorrect fuses or altered wiring, can increase the fire risk dramatically, especially if the car’s software isn’t calibrated to detect issues.

Most EVs are equipped with advanced safety systems to prevent fires

Modern electric cars are built with multiple layers of protection designed to avoid overheating and fire. These include thermal sensors, firewalls between battery modules, automated shut-off systems, and real-time battery monitoring.

When a fault is detected, the system can limit charging, reduce power output, or turn off the vehicle. These safety features have made EV fires exceptionally rare compared to the number of vehicles on the road.

Emergency responders now receive EV-specific fire training

Fire departments across the U.S. are adapting to the unique challenges of EV fires. Specialized training programs teach first responders to handle high-voltage systems, use thermal imaging to detect hotspots, and apply proper extinguishing methods. 

In some cases, EVs may need to be submerged in water or placed in containment units after a fire to prevent re-ignition from unstable battery cells.

Automakers continue to refine battery designs for greater fire resistance

Automakers are innovating new battery designs to enhance fire safety, including solid-state batteries, safer chemistries such as lithium iron phosphate (LFP), and improved thermal insulation. 

Some designs now feature cell-to-pack architectures that isolate failing cells more effectively. These changes aim to reduce the likelihood of thermal runaway and enhance heat dissipation, resulting in batteries that are not only more efficient but also significantly safer.

Recalls related to battery fires have affected several major brands

EV-related fire recalls have occurred across several major brands, including General Motors (Chevy Bolt), Hyundai (Kona EV), and Tesla. These recalls typically stem from specific manufacturing issues that increase the fire risk. 

Automakers have addressed them through battery replacements, software updates, or redesigns. While such recalls can be costly and inconvenient, they are critical in identifying and fixing safety flaws early.

Curious how policy changes could shake up car prices? Check out how Tesla risks billions as Trump eyes ending a key EV credit loophole.

Knowing the risks helps EV owners stay safer and more informed

While EV fires remain rare, knowing the risks and best practices can help owners stay safe. Use certified chargers, keep your software up to date, avoid excessive battery discharge, and heed any unusual warning lights or smells. 

Understanding how EVs work and how fires can start empowers drivers to take preventive steps, helping ensure the shift to electric mobility remains as safe as it is sustainable.

Want to see how serious off-road tests look? Check out the Rivian R1T taking on the Toyota Tacoma in a head-to-head challenge.

What do you think about EV fire risks? Let us know in the comments!

Read More From This Brand:

• These 15 Cars Are About to Rock the Auto World
• These 1950s Chevy Models Are Still American Icons
• You’d Think These Classic Cars Are Worth a Fortune

Don’t forget to follow us for more exclusive content right here on MSN.

If you liked this article, you’ll LOVE our free email newsletter.

This slideshow was made with AI assistance and human editing