‘Heat Dome’ Leads to Sweltering Temperatures in Mexico, Central America and U.S.

Extreme heat in Mexico, Central America and parts of the U.S. South has left millions of people in sweltering temperatures, strained energy grids and resulted in iconic Howler monkeys in Mexico dropping dead from trees.

Meteorologists say the conditions have been caused by what some refer to as a heat dome — an area of strong high pressure centered over the southern Gulf of Mexico and northern Central America that blocked clouds from forming and caused extensive sunshine and hot temperatures.