Whenever a field or ball diamond is unplayable due to wet conditions, the park department posts a red flag on that park’s flag pole.  The system, used in a number of North Texas communities, helps preserve turf and infield dirt on playing fields and open grass areas, and also provides residents with a quick visual reminder on that site’s playing status.  Once a red flag and companion closure signs are posted, that park’s fields or ball diamonds will remain closed until the flag and signs are removed (a red flag does not prohibit the use of playground equipment at that particular park).  The flag system governs field use by athletic teams for the local YMCA, teams from the Highland Park Independent School District and residents observing open play.  Individuals or teams that use a field or ball diamond when a red flag is posted will be told to end their activity.  A second offense by that same individual or team will result in the loss of field privileges and could result in a fine of up to $500. 

For more details about the playing status of a particular field or ball diamond, residents can call the city’s field-closure hotline at 214-987-5680.

source:  University Park Texas - uptexas.org