USA Today, August 11, 2015

"The team plays on synthetic turf, which can get significantly hotter than natural grass — sometimes a 35-55 degree difference. That would mean Monday, where it was 106 in the Dallas-Fort Worth area, the field could have been about 141-161 degrees."

The Washington Post, June 6, 2015

"Depending on the air temperature, turf can get as hot as 180 degrees."

NPR, August 7, 2008

"Since crumb-rubber turf absorbs and retains heat, the NYC Health Department report says heat is the primary health concern associated with playing on the fields. It says people can suffer dehydration, heatstroke and thermal burns at field temperatures above 115 degrees."

The New York Times, August 13, 2007

"Scientists at Columbia University who analyzed satellite thermal images of New York City the past two summers concluded that synthetic turf fields were up to 60 degrees hotter than grass fields."