LA's infamous smog started in the 1940s. I remember the news reports and jokes on late-night shows in the 70s. As alerts grew frequent, some wealthy Angelenos even built smog shelters. Photo essay reminds us of what was once horrific ("chemical attack?"), then normal, then tamed by science.

A “Hellish Cloud” Descended on Los Angeles in 1943A “Hellish Cloud” Descended on Los Angeles in 1943: It marked the city's first smog incident. Here’s what it looked like—back then and over the years that followed.nautil.us