PHOENIX (AP) -- For the second straight day, people in metro Phoenix are barred on Thursday from starting wood-burning fires. The restrictions were issued as pollution levels are expected to exceed federal health standards. Smoke from wood-burning fireplaces and smoke from fireworks are expected to worsen air quality. Inspectors will drive around neighborhoods to seek out violators and respond to complaints. First-time violators will receive a warning. Repeat offenders can face fines of up to $250 per violation. Smoke and soot from wood-burning pose risks to people with asthma and other respiratory ailments. No-burn restrictions are ordered when stagnant air and winter inversions trap pollution close to the ground. The restrictions include bans on burning wood in fireplaces, outdoor fire pits and other patio products. Gas and electric heaters are allowed.