Ontario fire services are warning residents about a sharp rise in lithium-ion battery fires, particularly from e-bikes and scooters, as incidents have more than doubled in recent years. Toronto Fire reported 76 such fires in 2024 — up 38 per cent from 2023 and 162 per cent from 2022. The Ontario Office of the Fire Marshal (OFM) says the fires are often caused by “thermal runaway,” a chemical chain reaction that generates intense heat, ignites the battery, and can lead to explosions and toxic smoke.
The growing risk has already resulted in major losses, including a 2024 Kawartha Lakes house fire linked to a charging e-bike battery that caused $900,000 in damage. This week, Health Canada recalled thousands of wireless power banks sold online by Amazon and Home Depot after warning their batteries could overheat.
Lithium-ion batteries power countless everyday devices — from laptops and smartphones to power tools and vaping products — but improper charging, use of uncertified accessories, or physical damage can trigger catastrophic fires. The OFM urges residents to follow strict safety practices:
- Use only manufacturer-approved batteries and chargers.
- Never overcharge, modify, or tamper with batteries.
- Keep batteries in sight while charging.
- Avoid damage from punctures, crushing, or water exposure.
- Stop using any battery showing signs of swelling, overheating, leaking, odd smells, or noises.
Officials stress that these fires spread rapidly and are difficult to extinguish, making prevention critical. More safety resources are available at chargedforlife.ca or via @ONFireMarshal on social media.