They built the city that way because it is the way people like to live -- until it catches on fire.
Today's post is an invitation for readers to watch an hour-long video: Inside the SoCal Firestorms on YouTube.
You might want to watch it because you are interested in what all the fuss is about.
You might want to watch it because you want to know why your fire insurance might get cancelled, or tripled in price, even if you live in a city neighborhood of single-family houses with a fire station less than a mile away.
You might want to watch it because you should rethink your current landscaping.
I recognize that most readers won't give it that time, so I will give some quick photo highlights. If you do watch the video, don't be discouraged by the bad audio at the very beginning. They fix that promptly.
First, something unusual about the Palisades fire. It started at a high elevation and moved downhill, pushed by wind. It started in brush but then got into houses and moved from house to house downslope. Most fires move uphill. This fire got so hot that it moved from house to house across block after block of houses.
This Google street-view scene shows a Palisades neighborhood that looks like neighborhoods I see in Medford and all across America. It is a widespread idea of "the American Dream," single family homes on city lots with nice green vegetation.
Most homes have shade trees and privacy hedges, some more than others.
The narration called attention to this third blue-gray house. Notice their fire-resilience: bare ground, concrete, trees well away from their home.
It burned up anyway. The adjacent home burned, so it burned.
The narrators said that the lesson from the 2018 Camp Fire that destroyed 18,000 structures in Butte County, California, including the town of Paradise, was that the homes that survived were ones that were 60 feet or greater from another structure that burned.
Embers from burning houses spread to the next house.
A typical entry point is at the rafters, vents, and gutters. The narrators said that when firefighters see a house in this condition, they know the house typically cannot be saved.
Dry conditions and high Santa Ana winds made Los Angeles particularly vulnerable. The fire apparently started in brush land adjacent to city streets. But once the fire entered the developed area it burned houses along with the green, irrigated landscaping. Green vegetation became fuel, not protection.
People do not choose to live in bare ground and concrete. We like green plants. City planners and planning codes encourage density, not sprawl, so by intention urban and suburban houses are closer together than 60 feet. Denser cities make water, sewerages, and public transportation more efficient. But there are tradeoffs that become catastrophic under house-to-house fire conditions.
The conditions in LA were extreme, but not wholly different from conditions that exist in much of the western U.S. on a hot, dry summer day. Medford has three months of dry weather with frequent days of 100+ degree temperatures. Our winters are wetter than are LAs, but that means there is more vegetation to dry out in the summers. I am going to re-think my landscaping, especially the lovely, tall bamboo up against the wooden deck along the front of my house. Green juniper is a common ground cover in Medford. It is hardy, trouble-free, and deer don't eat it. But firefighters call it "gasoline brush" because it burns hot and intensely. That is dense juniper along the front of my house where a discarded cigarette could set it ablaze.
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