"It cannot get more serious than it is. In some areas there has been no rain for three years. There is a 100km stretch of river which is dry. The companies have blocked rivers and are tapping streams on the mountain side," he added.
The greatest impact is being felt on the nomadic pastoralists in the semi arid areas to the north and east of Mt Kenya, says John Ole Tingoi of Hope, a Maasai human rights group supported by ActionAid in Kenya.
"The flower farms have taken over land that the pastoralists used and there is now less water available," he said.
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