At least six people have reportedly died in July due to the heatwave that continues to grip much of the U.S.

Health officials in Maryland report that four people have died from extreme heat in July. Two of the deaths occurred last week, while the first death was reported on July 3.

An Arizona air conditioning technician died Thursday while working in a homeowner's attic.

Mitch Petrus, 32, a former offensive lineman for the New York Giants, died of a heat stroke Thursday in Arkansas.  

The high heat and humidity can result in heat exhaustion, which is characterized by profuse sweating and a rapid pulse. Heat exhaustion can lead to severe dehydration and death. 

Although the temperatures are in the high 90's, the high level of humidity means it can feel more like 115 degrees in some areas.

The elderly and small children are particularly at risk during the heatwave. Citizens across the country were urged to stay home and to stay hydrated to protect their health. The poor and homeless are also at risk, because they may not have any shelter where they can keep cool.

Major public events were canceled across the country due to the warm temperatures. New York canceled the cultural festival Ozy Fest, where "The Daily Show" host Trevor Noah and billionaire Mark Cuban were set to appear. In Indianapolis, multiple concerts have been canceled.

Temporary relief appears to be on the way, as a cold front will arrive for parts of the Midwest. The East Coast is expected to cool off by Monday.

There have been many other deadly heatwaves. A heatwave that gripped North America in 2018 caused at least 70 deaths in Quebec. In 1995, a deadly heatwave in Chicago left more than 700 people dead.

Other parts of the world have also faced high temperatures this summer. In June, France reached its highest temperature at all time, at 115 degrees.