Elephants on the march across African borders as heat stress leads to fatalities

Mortality rate grows as animals roam long distances and clash with local people in desperate search for water

The climate crisis is pushing elephants on a forced migration across borders in southern Africa in search of water, creating problems for national parks and conservation efforts.

In recent weeks, Zimbabwe's elephants have been crossing the country's borders into Botswana, officials said on Tuesday. Exactly how many elephants are affected is not yet known. The development comes as a survey this month revealed that elephants are dying of heat stress.