 Demand for gas across the country really dropped off after the holiday. That really accounts for the decline. The heat wave across the country really might be keeping people indoors right now. There's just a big lack of demand. Arizona gas prices went down by about 3 cents. It's now about $3.49 a gallon. The national average also dropped by about 4 cents to $3.50. The most expensive gas is in Graham County. It's averaging about $3.73. And La Paz County has the cheapest at $3.39.