2001 Kerala Red Rain Phenomenon: Algae Spores Identified as Cause
2001 Kerala Red Rain Phenomenon: Algae Spores Identified as Cause
IN · Published Nov 7, 2026
• In July 2001, parts of Kerala experienced a rare meteorological phenomenon where rainwater turned red during brief, localised showers.
• The event lasted intermittently for about two months, with the first occurrence reported on 25 July in Kottayam district.

Impact & Risks

The red rain was a striking and unusual event that caused concern among local residents, some of whom reported hearing a loud sound and seeing a flash before the first shower. While the phenomenon was not harmful, it raised questions about its origin, leading to scientific investigations. The event highlighted the potential for atmospheric transport of biological and mineral particles, which could have implications for understanding localised weather patterns and environmental changes.

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