ST. GEORGE, Utah (AP) — Firefighters are battling a wildfire in southern Utah that authorities say was sparked by illegal fireworks. The blaze north of St. George had grown to nearly 19 square miles and was 0% contained as of Wednesday afternoon. The Spectrum newspaper reports authorities are searching for three teenage males spotted driving away from the area where the fire started on Monday. The fire forced a brief evacuation in Washington City at one point. It is burning through pinyon and juniper trees, dry brush and grass within the Red Cliffs National Conservation Area, a protected habitat for the threatened Mojave desert tortoise.