A prolonged and deadly heat wave in Mexico, one of the most extreme the country has faced, shows little sign of easing and is oozing into the United States, where it has already set records and fueled violent storms.

The heat has been breaking records in Mexico since early May. Many Mexican states have observed their highest temperatures on record, while more than 80 percent of the country is also enduring drought. Mexico City has set all-time record highs on multiple occasions, while fears grow that it may run out of water.

Mexico has been consuming record amounts of electricity and occasionally more than its utility infrastructure can generate and transmit, official data showed, as scorching heat raises the likelihood of power outages.

In the late afternoon on Monday, Mexico consumed 51,595 megawatts of electricity across the country, grid operator CENACE recorded.

When demand exceeds supply, the country becomes much more prone to outages.

The extreme heatwave in Mexico is not only affecting the environment, it's wreaking havoc on the howler monkeys and causing them to fall dead out of trees, the Associated Press reported. 

"They were falling out of the trees like apples. They were in a state of severe dehydration, and they died within a matter of minutes," wildlife biologist Gilberto Pozo described what he witnessed to the AP.