In addition to everything else that's wrong with e-voting machines, it seems they're not designed to operate in temperatures above 95 F. According to USA Today:
"Heat is a very serious problem for these machines, especially in Louisiana and Florida," said Dan Spillane, former senior testing engineer of touch-screens for a small equipment manufacturer in Seattle. "Basically, these things work in the secretary of state's office. Outside of that, no one knows."
According to technical standards for electronic voting systems, updated in 2002, voting machines must be able to tolerate storage temperatures ranging from minus 4 to 140 degrees Fahrenheit. They must be able to operate in "natural" conditions and temperatures ranging from 50 to 95 degrees.
Those standards aren't satisfactory to Vincent Lipsio, a firmware design engineer in Gainesville, Fla. Lipsio, who is helping draft e-voting equipment standards for the Institute of Electrical and Electronics Engineers, said most hardware that's considered 'mission critical' — including medical devices, military equipment and aviation hardware — should tolerate 180 degrees or more.