Victoria, B.C. (Rajeev Sharma): A new provincial disaster report paints a stark picture of the potential devastation a major earthquake could bring to British Columbia—and underscores that preparation is just as crucial as the quake itself.
The British Columbia Disaster and Climate Risk and Resilience Assessment (DCRRA), released in October 2025, describes a scenario that, while extreme, is considered highly plausible by experts. Imagine a midsummer heatwave during wildfire season: a megathrust magnitude 9.0 earthquake strikes off the coast of Vancouver Island. In minutes, violent shaking sweeps across Vancouver Island and the Lower Mainland, damaging 18,000 buildings, killing more than 3,400 people, and injuring 10,000.
As communities struggle to respond, a tsunami warning is issued. Within 10 to 20 minutes, waves crash into Victoria’s Inner Harbour, compounding infrastructure damage. Emergency services are further challenged as wildfires continue to burn nearby, limiting mobility and response efforts. Later, in late September, a magnitude 7.1 aftershock strikes 60 kilometres below Sidney, coinciding with an atmospheric river, creating additional flooding and hazards.
While this may sound like a scene from a disaster film, the DCRRA notes that this scenario is among the more likely earthquake events for B.C. The report estimates the annual likelihood of such a catastrophic event at under 1 per cent, but that risk increases to between two and 10 per cent over the next 10 to 30 years.
Scientists have long warned that a massive earthquake—commonly referred to as “the big one”—is inevitable along the Cascadia Subduction Zone. The fault has produced major quakes roughly every 400 to 500 years, and as of 2026, it has been 326 years since the last event. Current projections suggest a 37 per cent chance of a magnitude 7.1 or greater earthquake occurring in the next 50 years in this region.
The DCRRA aims to make this risk information widely available to communities, emergency responders, and planners, helping them prepare for complex disasters that could include earthquakes, tsunamis, wildfires, and flooding. The Ministry of Emergency Management and Climate Readiness (EMCR) emphasized that being proactive is critical. “Being prepared is vital to reducing those risks,” a ministry spokesperson told Victoria News.
The report serves as a reminder that while scientists cannot predict the exact timing of the next megathrust quake, understanding the risks and taking action now can save lives and minimize destruction when it does arrive.
