#hydrogen-cyanide

2 articles.

A dark living room late at night: a small orange ember smolders between the cushions of a fabric sofa with a thin ribbon of smoke rising, no open flame, and a softly lit doorway to a bedroom beyond — the start of a fatal smoldering fire.

Fire Fundamentals

Smoldering vs Flaming: The Fire That Kills You in Sleep

A smoldering fire shows no flame and little heat, yet it loads a house with carbon monoxide for hours while you sleep. Here is the chemistry that kills.

July 14, 2026 · 15 min read

A dark living room early in a house fire, seen from floor level: a thick black smoke layer presses down from the ceiling and glows orange, while a thin band of clearer air remains near the floor over a sofa, coffee table, and doorway — showing why smoke inhalation strikes before the flames reach you.

Fire Fundamentals

Smoke Inhalation: Why the Upper Layer Kills You First

Smoke inhalation kills more fire victims than flame does. Here is the toxic upper layer, the CO and HCN dose, and the FED clock that times your escape.

June 26, 2026 · 15 min read