From 8 a.m. to 5 p.m. tomorrow, a training exercise in an active threat or mass casualty will take place at Highland Park High School. Repeat: this is only a drill. Remain calm.
But, drivers and residents alike will undoubtedly see police, fire, and emergency vehicles at the scene. Westchester Drive will be closed to traffic from Emerson Avenue to Grassmere Lane for the duration. Yes, there will be traffic barriers and signs.
The exercise will include the University Park fire and police departments, Highland Park DPS, and SMU police. Stay safe out there, everybody.