Delta Air Lines (NYSE:DAL) is having a strong day on Wall Street, with shares up more than 9%. However, the airline company has had some operational headaches in Atlanta, where a winter storm has forced the closure of five runways.

ATLANTA — ATLANTA — Acuity Brands Inc. (AYI) on Wednesday reported fiscal first-quarter profit of $106.7 million. The Atlanta-based company said it had profit of $3.35 per share. Earnings, adjusted for one-time gains and costs, came to $3.97 per share.