There are scores of videos posted to social media of people frying an egg on hot pavement. New research shows, however, just how dangerous that hot pavement can be to your feet or other areas of bare skin.

A team of surgeons from the University of Nevada, Las Vegas, (UNLV) School of Medicine reviewed five-year's worth of pavement burn admissions to a Las Vegas area burn center to determine at what point "hot is too hot," according to a press release.

“Pavement burns account for a significant number of burn-related injuries, particularly in the Southwestern United States,” said Dr. Jorge Vega, UNLV School of Medicine surgeon and the study’s lead author. “The pavement can be significantly hotter than the ambient temperature in direct sunlight and can cause second-degree burns within two seconds.”

Of 173 pavement-related burn cases identified between 2013 and 2017, 149 resulted from isolated incidences such as walking or falling on hot pavement. Twenty-three others involved pavement burns related to vehicle crashes, according to the study published in the July/August issue of the Journal of Burn Care & Research.

More than 88 percent of the burns resulted when temperatures topped 95 degrees Fahrenheit. The risk increased as temperatures exceeded 105 degrees.

"The risk of pavement burns in areas of direct sunlight begins around 95 degrees Fahrenheit and increases exponentially as ambient temperatures rise," the author's wrote.

Co-author Dr. Syed Saquib, UNLV assistant professor of surgery and medical director of the University Medical Center Lions Burn Care Center, told weather.com he was surprised that the burn center began seeing admissions starting at 95 degrees.

"I expected the threshold temperature to be higher. Otherwise, it validated what my colleagues and I anecdotally observe at University Medical Center Lions Burn Care Center — as the temperature gets very high outside we see a significant number of people sustaining pavement burns," he said.

Those most at risk include victims of automobile accidents, the elderly and others with medical emergencies, who may fall onto hot pavement, or children, who may not know any better until it's too late.

"Children usually have thinner skin which means that they can sustain a deeper burn than adults when exposed to the same hot pavement. Furthermore, younger children can be at higher risk of sustaining an injury if they are not aware of the hot pavement,' Saquib told weather.com.

(MORE: Why Nighttime Temperatures Are Also Dangerous During Heat Waves)

According to the research, direct sunlight causes the pavement to absorb radiant energy, increasing its temperature to levels far higher than air temperature.

For example, on a 111-degree day, pavement in direct sunlight can reach a scorching 147 degrees Fahrenheit.

The researchers say they will use the information revealed in the study to help centers better prepare for the treatment of summertime burn victims.

"Now that we have this information, we plan on using it to continue to advocate for burn injury prevention and to educate the public at large. UNLV and UMC Lions Burn Care Center are already very involved in the community on burn advocacy. Raising awareness on this topic is extremely important to us as the entire city population is at risk of suffering hot pavement burns when the temperatures are high," Saquib said.

In case you were wondering, an egg becomes firm at 158 degrees Fahrenheit, the press release noted. However, the famed scientist Bill Nye found that an egg begins to cook on hot pavement when it reaches 130 degrees, but it takes more than 20 minutes to fully cook the egg at that temperature, Live Science reported.