Generally, Major League Baseball (MLB) teams will continue play in light to moderate rain but will suspend play if it is raining heavily or if there is standing water on the field. Games can also be delayed or canceled for other forms of inclement weather, or if the field is found to be unfit for play, and for other unusual causes such as bee swarms. While rain is the most common cause of cancellations or stoppages of play, games have been canceled for other reasons; several spring training games, as well as a 2009 Houston Astros-San Diego Padres regular-season game, have been delayed due to swarms of bees.