MEXICO CITY (AP) — The number of heat-related howler monkeys deaths in Mexico has risen to 157, the government said, with a tragically small number of the primates treated or recovering. — an area of strong high pressure centered over the southern Gulf of Mexico and northern Central America — has blocked clouds from forming and caused extensive sunshine and hot temperatures all across Mexico. Last week, environmentalists had reported that 138 of the midsize primates, known for their roaring vocal calls, since May 16.
Almost two-thirds of the country are expected to see highs of 45 degrees Celsius (113 degrees Fahrenheit) on Monday. Late Sunday the Environment Department reported that number had risen to 157, and that research was continuing into the causes of the deaths. But a wildlife biologist on the scene said it appeared to be heat stroke.
The department said deaths were occurring in both Tabasco and the neighboring state of Chiapas, and that 13 monkeys were under treatment and seven had been treated and released back into their habitat. The department said some of the monkeys were being treated for dehydration, and that three were in serious but stable condition. Moreover, with heat, fires, and deforestation hitting the trees where the howler monkeys live, it was unclear whether even releasing them could ensure their survival.
Wildlife biologist Gilberto Pozo attributed the deaths to a “synergy” of factors, including high heat, drought, forest fires and logging.