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If blue flames appear in a coal fire, it is a sign that a storm is approaching.

Blue Flames in Coal Fire as Storm Omen

Details

This superstition holds that when a coal fire burns with unusually blue flames—rather than its typical orange or red—it signals that a storm or inclement weather is imminent. Blue flames were seen as unnatural or rare, prompting concern among those who relied on coal stoves or fireplaces, especially in rural or seafaring communities. People interpreting such signs might take precautions, such as securing property or avoiding travel. The belief likely stemmed from observing changes in atmospheric pressure and humidity that can affect how flame color appears. Though not practiced ritualistically, attentiveness to coal fire colors functioned as an informal weather forecasting method for many households.

Historical Context

This superstition was commonly cited in 18th and 19th century Europe and parts of coastal North America, particularly in regions where coal fires were central to household heating. Coal stoves often served as indoor gathering points, and changes in flame color were easily noticed. The blue coloration could have resulted from increased humidity or changes in air quality preceding storms—observable indicators long before modern meteorological tools existed. In the absence of scientific weather forecasting, such visual cues were crucial. This practice is aligned with many rural and maritime traditions that relied on natural signs to predict changes in weather and seasons.

Modern Relevance

Today, this superstition is largely obsolete due to widespread use of modern weather forecasting technology and the decline of coal fires in daily life. However, it may persist in folk memory or be referenced in historical or cultural literature concerning rural traditions. In heritage preservation and living history museums, reenactments of old domestic life may occasionally describe this belief as part of daily weather awareness. On niche social media pages or folklore discussion forums, individuals curious about historical superstitions continue to document and share such beliefs. Its symbolism may also be adapted into fictional narratives or period dramas.

Sources

Daniel R. Collings (1970). ‘Old Wives’ Tales and Weather Lore of the British Isles.’ Folklore Archive.

Quick Facts

Historical Period

19th Century Europe

Practice Type

Observational Belief

Classification

Protection Warning

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