The dataset they assembled is pretty amazing. After each fire in California, the state’s fire agency, Cal Fire, sends a team of technicians to investigate. They create detailed maps of the burn areas and document, house by house, damages. The economists used this rich data on burn areas between 2001 and 2015, focusing on the houses that burned and the nearby houses that did not. They combined this data with their own comprehensive data on virtually every home in California.

One sort of obvious reason for this is these rebuilt houses were newer. And they were built to follow a more modern, state-mandated building code, making them more resistant to fire and earthquakes and generally safer. And, just as Wallace had observed in her own neighborhood, these rebuilt houses tended to be bigger.

And, in big wildfires, the houses in whole neighborhoods got built back bigger and better. Because the value of your house is influenced by the value of houses in your neighborhood, that was another boost to property values. Meanwhile, nature recovers — and, Wallace says, it recovers rather quickly in areas with Mediterranean climates — and the amazing beauty of these Californian communities returns.