Petrus got sick on Thursday night after working out at his parents' store in Lonoke County, says Pulaski County Coroner Gerone Hobbs. He was taken to the Baptist Health Medical Center in North Little Rock just before 9 am and was pronounced dead just before midnight, Hobbs said.
The temperatures in the area reached 92 degrees during the day, and a heat supply was in effect in Arkansas when Peter fell ill. When the body temperature rises faster than it can cool, "heat stroke" occurs, which can damage the brain and other vital organs.
Peter's mother told the prosecutor that her son had been drinking water while working outside but not getting enough electrolytes. Peter did not seem to have any existing conditions, Hobbs said.
Son of Sue and Phil Petrus, the former offensive ruler lived in Carlisle, Arkansas, according to the New York Giant website. Petrus played for Carlisle High School and then for Hogs, the University of Arkansas Razorback's soccer team, graduating in 2009 with a degree in the agricultural industry.
He contributed to the New York Giant's nailbiting Super Bowl defeat by New England Patriots, 21
-17, in February 2012. Peter also played for the Tennessee Titans and the Patriots before retiring from the NFL 2013.  Suggested that he could have made "a nice living in the Ultimate Fight Championship circuit" noted Giant's website that Peter "must fight for everything he has earned on the football field."
Peter describes himself as a "bass player for my band Vikings of the North Atlantic" and said he served as an assistant to the state Senate Jonathan Dismang during the 2018 law meeting.  Reactions to Peter Death included warnings of heat stroke, which is potentially fatal.
In addition to a high body temperature, warning signs for heat disease include warm, red, dry or moist skin and a fast, strong pulse, according to the US Center for Disease Control and Prevention. Later symptoms may include headaches, dizziness, nausea, feeling confused and losing consciousness (passing out). Extreme dehydration is also part of the heat radiation equation.
A cascade of physiological events occurs when a patient's organs begin to shut down, the body is no longer able to regulate blood pressure and the blood does not coagulate. Many patients experience changes in consciousness.
Treatment is about rapidly cooling and rehydrating to lower body temperature as soon as possible. Ice baths, ice bags and fans are all useful.
Usually, people working out or exercising are much more acclimated to the heat and therefore less likely to fail for disease. That being said, anyone who is exposed to hot weather for a long time can get sick.
Along with being acclimatized with the weather, a person who wants to avoid heat radiation can wear durable clothes in the sun, drink plenty of water and take it easy during the hottest part of the day.
 CNN's Tina Burnside and Chuck Johnston contributed to this report.