The Red Rain of Kerala: When Blood-Coloured Water Fell for Two Months

2026-07-04 · Nature Defying Explanation · 9 min read

The washing was the first thing to betray it. In the last week of July 2001, women in the hill villages around Kottayam and Changanassery, in the south of the Indian state of Kerala, pulled their laundry from the line and found white cotton freckled with pink, as though someone had flicked a brush of thin blood across the drying shirts. Rain had fallen while the clothes hung out, and the rain had come down coloured. In the days that followed the same rose-coloured stain settled on rooftops and courtyards, pooled in the ruts of red-dirt lanes, and, some said, tinted the water standing in wells. People stood in their doorways and watched water the colour of watered wine fall out of an ordinary monsoon sky, and asked one another the only question that mattered: what is in it?

It was not a single freak shower. The red rain began, by the official reckoning, on 25 July 2001, and it returned in fits and starts until 23 September, a span of almost two months. It did not fall everywhere at once. It arrived in sudden, localized cloudbursts over one district, stopped, and then broke red again somewhere else days later, scattered across the southern districts with Kottayam and Idukki worst affected. Stranger still, not all of it was red. In places the downpours came down tinted yellow, green, even black, as if the sky were working through a palette. And a handful of residents insisted that the very first fall had been heralded, in the hours before, by a loud clap like a thunderbolt and a flash of light, with no storm to account for it, as though something overhead had burst.

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