 Still, Arkansas ranks as the 14th fastest-growing state in the nation, and Zook says the burgeoning lithium industry in some of these areas could bring changes to the southeastern region of the state. Partly cloudy and 96 degrees here in Little Rock. We're looking at a heat index of 109 degrees right now, and we're under an excessive heat warning until 8 p.m. this evening. It's Little Rock Public Radio.