Hundreds of thousands of flamingos and other wildlife are at risk after five forest fires erupted in Kenya on Saturday, say wildlife officials.
Police say they suspect some of the still-raging blazes were started by communities to make space for farmland.
The fires have had an adverse effect on the Masai Mara and in Tanzania on the Serengeti national park, officials say.
Other wildlife reserves are under threat, including Lake Nakuru, which is home to almost a million flamingos.
According to the Kenya Wildlife Service (KWS), all the rivers that drain from south-western Kenya’s Mau forest into the lake have dried drastically.
Nearly 60 species of wildlife, including white rhino, depend on the lake.
By Sunday an estimated 200 hectares (500 acres) of woodland had been razed in Mau – East Africa’s largest indigenous forest.
KWS communications manager Paul Udoto told the BBC: “We now have to pump water from underground bore holes to shallow pans to water the animals in the park otherwise they will all die. This is costing us a lot of money.”
Members of communities opposed to government plans to move them out of the Mau forest are suspected, say police, and several people have been arrested, accused of arson.
Another blaze nearby has destroyed about a quarter of the 52 sq km (20 square miles) Mount Longonot National Park, an extinct volcano in Kenya’s Rift Valley, said officials.
Zebras, buffaloes, antelopes, gazelles and giraffes have fled the fires, crossing roads and residential areas to reach safety, said witnesses.
But some wildlife experts said snakes and smaller animals, like rabbits and mongooses, may not have managed to escape.
Kenya is suffering a drought this year that has contributed to hunger the government says is affecting 10 million people.