Washington (ONGC) Analysis | June 16, 2021 by Catherine Zacuto, M. Ed.
Big Sur just lost a section of its famous coast-hugging highway, and it’s not the first time. The super-scenic roadway boasts magnificent views of giant Redwoods to the east and bluest of blue Pacific Ocean to the west. Drivers struggle to keep eyes on the road as the jaw-dropping views captivate their passengers. Being perilously close to the edge of the continent, though, has its dangers. Two recent catastrophic breaks in the road resulted in sections of the highway plunging into the Pacific, hundreds of yards below. Scientists and residents are finding connections between climate change and the damage done to their beloved two-lane road.
What’s the heart of the matter? The beginning of this story is the summer of 2020, when the Dolan Fire burned over 125,000 acres just east of Big Sur. Burn scars near the area can still be seen. Stripping the area of forests, shrubs and ground cover, the fire left the area vulnerable to soil erosion. Add into the mix a fierce rainstorm which dropped 16 inches of rain in the area. The catastrophic destruction of a 150-foot section of Highway 1, near Big Sur on January 28, 2021 was anticipated by officials. Acting out of caution and no doubt previous experience, Cal-Trans spokesperson Jim Shivers noted that 40 miles of the highway had already been closed in anticipation of mudslides near the burn scar.
How does this impact you? We have cause for concern. A “slip-out,” the Los Angeles Times noted, happens when the soil surrounding the road is so full of water that the force of gravity wins and the road falls down the cliff. The “atmospheric river” that triggered this most recent slip-out was basically a moving column of water vapor that brought extraordinary amounts of rain to the coast. According to the Guardian, the amount of rain that dumped on the central coast last week was double the amount the area had, on average, all month.
Place the massive rain event in a burn scarred area, as this one was, and the road had no chance. In burn areas, heavy rainfall causes debris flows that rip up vegetation, choke pipes, and chase people from their homes. There are long-term consequences, as well. Post-fire landslides are a danger for years after the fire. And according to the U.S. Geological Survey, debris flows that happen over a longer period of time result in root decay and loss of soil strength. The soil has little chance of recovery between weather emergencies.
This recent Big Sur slip-out demonstrates the tragic but logical chain of events that resulted in the highway crashing into the sea:
- massive wildfire
- dry landscape
- ferocious rainstorm
In recent years Californians have seen more evidence of climate change. As high winds and dry vegetation become more common, firefighters can expect to be called into action in any season of the year. Aggravating the situation, some sources, such as Jay Lund writing in the “California WaterBlog,” predict a multi-year drought for the state in the near future. Any one of these events, by itself, poses serious threats. Taken together, they point to the need to act now.
What can you do to help? Climate change affects all of us. You’ve no doubt experienced surprisingly destructive wind, rain, tornadoes, or hurricanes. Snow storms in May. Rising water levels. We know the signs. With science back in fashion, one thing you can do is advocate for change. Stay informed about legislation you can support at the local, state and national levels. Communicate your support for climate change policies. And, as always, remain committed to making a difference by living and modeling a sustainable lifestyle.
- If you live in a fire-prone area, remove dry brush that fuels fire
- Foster lush native trees, plants, and undercover to anchor the soil
- Connect with neighbors and friends about ways to slow climate change
- Volunteer with a local organization working for change
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