JMFD Trucks First out truck on structure fire responses Pumper/Tanker. 2nd out vehicle on structure fire responses. Grass Rig. 1st out truck on brush and wildland fires. Grass Rig, Water Supply, Backup Rescue. 2nd response on wildland fires. Wildland, Brush Vehicle, Medical. Used for wildland fires and medical rescue. Rescue, Medical. 1st out truck on medical calls and vehicle accidents.