At roughly 3:15 p.m., the rain was falling harder, and the officials decided that the track was "lost." They judged there was not sufficient time left in the day to wait out the shower, dry the track once again, and complete the final 97 laps.
At around 3:15 p.m., the rain was intensifying, causing the officials to decide that the track had "failed." They determined there wasn't enough time left in the day to wait out the shower, dry the track once more, and complete the final 97 laps.