Whiteville High running back Jerrod McKinney runs through an agility drill during Tuesday evening’s football practice session at Legion Stadium. All four Columbus County high school teams opened their pre-season workouts on Monday with morning or evening sessions. The current heat conditions that are causing huge effects on the nation this week have been heavily monitored by high-school football coaches with frequent rest and water breaks. Whiteville, West Columbus and East Columbus will open their respective seasons on Aug. 18, with South Columbus scheduled to open on Aug. 25