British Columbia’s Climate Risks: Insights from Indigenous Knowledge

The “British Columbia Disaster and Climate Risk Assessment” highlights significant climate-related challenges facing the province, drawing on Indigenous wisdom to emphasize the interconnectedness of these risks. The report, released in October, provides a comprehensive overview of the threats posed by climate change and natural disasters, including riverine floods, coastal floods, extreme heat, wildfires, and droughts. It also includes the geological threat of a major earthquake, similar to the devastating event that struck B.C. on January 26, 1700.

The report’s epigraph, a Haida proverb stating, “Everything depends on everything else,” aptly summarizes the complexity of the issues at hand. While the assessment focuses on British Columbia, it acknowledges that disasters can arise from various sources, necessitating thorough preparation and mitigation strategies.

Comprehensive Risk Assessment

This assessment does not prescribe specific actions but instead evaluates historical events and estimates their likelihood of recurrence. It examines the risks those events pose to communities, ecosystems, health, and overall prosperity. For instance, the report questions how much funding should be allocated for flood mitigation in the Fraser Valley compared to retrofitting homes with air conditioning to cope with extreme heat.

Riverine flooding is identified as a frequent threat, warranting ongoing investment in building and maintaining dikes and drainage systems. The assessment also emphasizes the importance of avoiding construction on floodplains to reduce potential damage from future floods.

When it comes to the potential for a major earthquake, historical data indicates that a magnitude 9 subduction quake has occurred 19 times in the past 10,000 years, averaging one every 500 years. Although the last such quake occurred in 1700, the report suggests that while this event is a significant concern, its likelihood remains “remote.”

The report also highlights the potential destruction such a quake could cause, estimating that it would exceed the costs associated with all other disasters in B.C. since European settlement. Nonetheless, it acknowledges that preparedness efforts may become outdated by the time a significant event occurs, emphasizing the need for ongoing scientific and technological advancements.

Climate Change and Its Consequences

The assessment identifies “low and slow” heat waves as highly likely outcomes of climate change, lasting six days or more, which could lead to wildfires, poor air quality, and severe thunderstorms. The report warns that extreme heat events are projected to become increasingly common as global temperatures rise.

According to the UN Climate Summit 2023, global temperatures could rise by 1.5 degrees Celsius as early as 2026 if emissions continue on a high pathway. By the 2050s, a rise of 2.5 degrees Celsius could make extreme heat events likely across half the province, with 4 degrees Celsius of warming predicted by the 2080s leading to extreme heat events becoming almost certain throughout most of British Columbia.

Mark Lynas, in his book “Our Final Warning: Six Degrees of Climate Emergency,” warns that a 2-degree Celsius increase could render the Arctic Ocean ice-free in summer and lead to catastrophic consequences globally. As the climate crisis intensifies, British Columbia will likely face not only its own disasters but also the effects of crises occurring elsewhere.

For instance, wildfires in Siberia may impact air quality in Western Canada, while drought conditions on the Prairies could disrupt grain exports from the Port of Vancouver, affecting global food prices. Moreover, rising temperatures may drive millions of climate migrants towards Canada, exacerbating social and political tensions.

In conclusion, the “British Columbia Disaster and Climate Risk Assessment” underscores the urgent need for preparedness and resilience planning in light of both local and global climate challenges. As the Haida proverb reminds us, everything is interlinked, and understanding these connections is crucial in navigating the complexities of climate change and disaster readiness.