Bearded dragon Ember, green with orange beard

I lost my bearded dragon, Ember, yesterday around 3pm in Texarkana near the Walmart on New Boston Road. Ember is about 8 inches long, bright green with darker brown bands and a vivid orange beard that pops when he's stressed. He was in a black 20-gallon terrarium with a cracked lid and a heat lamp; Ember wriggled out while I was loading groceries and disappeared under a parked SUV. Distinguishing features: a tiny blue sticker at the base of his tail and a faint white speckling along the left side of his belly. This was a gift from my sister, and I really need him back—he's got sentimental value and I'm worried.