WARRENSBURG — Between youth sports, vacation beaches and everyday lawn care, being aware of the dangers of heat exposure can help determine when to call for an ambulance.  Johnson County Ambulance District Director Shane Lockard said there are factors that can make anyone more susceptible to heat-related illness.  “Seems like the problem comes in when we start doing strenuous activities, mowing the yard, working in the garden, doing some kind of sporting event and even amplified when you have a medical condition,” Lockard said.  Lockard said the threat of heat exhaustion happens most frequently when temperatures reach above 90 degrees...