Disneyland Resort typically makes every effort to proceed with fireworks "rain or shine," but the shows are frequently cancelled or modified due to high-altitude winds or lightning rather than light rain alone. Because the pyrotechnics are launched high into the air, wind speed and direction are the primary safety concerns, as they determine where hot debris might land. If it is raining steadily, the park may cancel the "fireworks" portion of the show but still run the projections and music on Sleeping Beauty Castle and Main Street, U.S.A., often referred to as a "projection-only" performance. Decisions are often made at the very last minute, sometimes just seconds before the scheduled start time, as weather conditions at higher altitudes can change rapidly. If a show is cancelled, an announcement is made over the park's PA system. To avoid disappointment on a drizzly day, it is best to check the Disneyland app for real-time status updates and be prepared for a "rain check" performance if the skies don't clear.