
The Day Donora’s Air Killed the Town
In October 1948, a temperature inversion trapped industrial pollution over Donora, killing 20 people immediately and sickening thousands in one of America’s defining air-pollution disasters.
37 evidence-led chapters of Pittsburgh history, plus food, neighborhoods, events, and local culture from PittsburghEverything.
Complete investigative history collection
A 37-chapter investigative series on Pittsburgh power, labor, gambling, public health, redevelopment, political reform, industrial disaster, and the neighborhoods that absorbed the cost — with evidence ledgers, not folklore.
37 chapters · evidence ledgers · careful sourcing
50 stories found

In October 1948, a temperature inversion trapped industrial pollution over Donora, killing 20 people immediately and sickening thousands in one of America’s defining air-pollution disasters.

At Homestead in 1892, a labor dispute became an armed battle after Pinkerton agents arrived by barge to retake the Carnegie Steel works.

In 1909, immigrant workers at Pressed Steel Car challenged opaque pay practices and factory discipline in a strike that exploded into deadly violence.

The 1907 Darr Mine disaster killed 239 miners and exposed the lethal price hidden inside western Pennsylvania’s coal economy.

The 1918 influenza pandemic killed nearly 4,600 Pittsburgh residents and exposed how war production, crowded transit, smoke and delayed closures amplified biological vulnerability.

The Great St. Patrick’s Day Flood of 1936 drove the rivers to roughly 46 feet at the Point and temporarily broke the machinery of Downtown Pittsburgh.

Lower Hill urban renewal cleared a dense Black neighborhood for a redevelopment vision whose promised replacement city took decades to materialize.

After Martin Luther King Jr. was assassinated in April 1968, grief, anger, unrest and a later peace march transformed Pittsburgh’s Hill District in different ways across the same week.

The collapse of western Pennsylvania steel in the late twentieth century erased jobs faster than communities could replace the wages, tax base and identity built around the mills.
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