A paper in the Journal of Emergency Management came across my desk today. Measuring the Efficacy of a Wildfire Education Program in Colorado Springs
Timely, considering the state of Southern California right now and of Tahoe earlier this summer.
The program sounds like a fascinating way to increase awareness of the fire risk (awareness being the key factor in reducing the controllable variables). Preparation for disasters like this is of course subject to the Black Swan effect:
...most people are uncomfortable making risk estimates of uncertain events such as wild fires... They may think, "There has never been a wildfire where I live, so it is very unlikely that there will be one in the future."
So what can public policy do to motivate people to better manage their exposure? In Colorado Springs, they evaluated every parcel, 35,000 of them, and gave each a rating. Now the city can tell me I have a very-high-risk property and get me thinking about trimming the pine boughs back from my cedar-shingle roof. Then they publish that information. When I go to buy a home in the area, I can factor that into my purchase. That's positive.
But is it effective? And how do we measure changes in risk perceptions? The authors of the paper took a novel approach.
Rather than simply measuring changes in risk perceptions, we examine the effect of the program on the housing market. This provides a more complete picture of how the CSFD approach to education affects homeowner attitudes toward wildfire risk.
A market-based approach. Nice. Incent homeowners to fix the easy stuff that makes up most of the wildfire risk. Very cool.
And the results?
Perhaps the most striking result is that pre-assessment home prices and wildfire risk were positively correlated. In other words, houses with higher wildfire risk also had higher sales prices. The reason for this is [otherwise desirable features also increase fire risk]...building on a ridge may increase the wildfire risk, it also provides better views.
In contrast, post-assessment there is no such correlation. Post-assessment wood roofs and wood siding now have a negative impact on price. As a result, people are migrating to safer building materials.
Good stuff. Too bad it's a lesson a bit too late for the disasters this week. We'll keep an eye on the data to see if we can discern any immediate impact on home prices in San Diego from the fires. Will report back soon.