AUSTIN-- Heat exhaustion is one of the most common maladies that park rangers encounter during the summer months, and with temperatures soaring to scorching heats well above 90 degrees, Texas State Park staff are encouraging park visitors to follow basic heat safety precautions to stay safe on the trail. Heat exhaustion, dehydration and heat stroke can be prevented by drinking wa-ter, wearing proper clothing, hiking in the morning or evening, checking the weather ahead of time and knowing t ...