High Quality Content by WIKIPEDIA articles! The Kerala red rain phenomenon was a blood rain (red rain) event that occurred from July 25 to September 23, 2001, when red-coloured rain sporadically fell on the southern Indian state of Kerala. Heavy downpours occurred in which the rain was colored red, staining clothes pink. Yellow, green, and black rain was also reported. Colored rain had been reported in Kerala as early as 1896 and several times since then.