L.A.’s fires reshaped the city. They may also have triggered changes in our bodies

It’s been seven months since I looked up from my desk here in The Times’ El Segundo office and saw smoke roiling over the horizon.

The sky behind the billowing dove-gray clouds was still blue and clear. Across the county, people who would not live to see the next sunrise still watered their plants and chatted with neighbors and went about their business. I snapped a photo of the Palisades fire , unaware that I was looking at an entity already in the process of changing Los Angeles irrevocably.

The Eaton fire erupted hours later. By the following afternoon there was no distinction between smoke and sky, just that acrid, asphyxiating gray that made eyes water and chests tighten throughout Los Angeles County.

For days, we breathed in each other’s lives. Flames took the contents of our