Hundreds of quiet deaths were caused by an invisible disaster: unprecedented heat

The Pacific Northwest heat wave in late June was a mass casualty event, officials said. Hundreds of people likely died in the multi-day, record-breaking heat, and the death toll continues to rise.

The Pacific Northwest heat wave in late June was a mass casualty event, officials said. Hundreds of people likely died in the multi-day, record-breaking heat, and the death toll continues to rise.