It's hard for me to believe that there was (or is) this much previously undiscovered water under Kenya, but that's supposedly what just got discovered. This is likely to be a good thing for Kenya.
Huge aquifers are discovered in northern Kenya
"Radar Technologies International, the natural resources exploration firm that discovered the aquifers, said that they contained “a minimum reserve of 250 billion cubic meters of water,” or about 66 trillion gallons, and that rainfall in Kenya and Uganda refilled them with about 898 billion gallons annually."
(the linked press release includes an aquifer map)