The Donora Pennsylvania Smog In late October 1948, a noxious smog enveloped the Monongahela River Valley town of Donora, Pennsylvania. In the 5 days October 26 to 31, 20 people died. Within 1 month, about 70 had lost their lives and the town funeral parlor ran out of caskets. And some, like Devra Davis’ grandmother, … Continue reading Killer Smog