The text talks about the phenomenon of the Nile river turning red, reminiscent of blood, which has been reported multiple times in the past. The cause of this occurrence is believed to be due to red clay or red-colored floating organisms washed down from Ethiopia. It has been reported at least twice in the last seven years, and it is believed to be caused by red tide. The similarity to the biblical description of the Nile turning blood red has been pointed out but the cause is attributed to natural occurrences. This event has been referred to as "one of the Seven Plagues of Egypt" and has been reported in Western media in the past. The reason behind rivers and lakes turning blood red is still not clear.