Herds of elephant, buffalo and zebra have gathered near one of the holes, where for six months, pea farmer Patrick Mwalua has been delivering water to them in a rented blue truck.
After the rains failed for the third time in November, Mwalua was so distressed by the obviously weak and thirsty animals that he began seeking donations to bring water to the Taita Hills sanctuary.
The 41-year-old was haunted by the memory of a 2009 drought, which the International Fund for Animal Welfare estimates led to the loss of 40 per cent of the animals in the neighbouring Tsavo West National Park.
Over his lifetime, Mwalua has seen the climate change drastically, with droughts causing chronic water shortages and increased conflict between villagers and wildlife.
More From This Section
Thirsty elephants -- which can drink up to 190 litres (400 pints) of water in one sitting -- have in recent months carried out often deadly raids on villages in search of water.
To the majority of locals struggling to survive the failure of their crops, these wildlife neighbours are little more than a menace and competition for land and resources.
He reached out to foreigners, who had participated in a conservation programme he runs, to ask for donations to pay for the USD 250 (237-euro) truckloads of water.
At first, he would pour it into natural water holes but quickly realised that much was soaked up by the baking earth, so turned instead to a cement hole near a tourist lodge.
The animals "come running the moment they see the truck, they even know the timings. When they are really thirsty they even drink when the truck is emptying," the lodge's assistant manager Alex Namunje told AFP.
"It has blown my mind," said Mwalua, who plans to buy his own water truck and dig a borehole in the park.
Meanwhile, the David Sheldrick Wildlife Trust -- famed for rearing orphan elephants -- has now joined him in trucking in water to the water hole.
In a sign of the crisis the region faces, the charity has drilled 13 boreholes over the years, Angela Sheldrick, who runs the trust, told AFP.
"It is a good initiative but how much water can we truck into Tsavo? How many boreholes can you sink?" asked Jacob Kipongoso, head of the Tsavo Heritage Foundation.