There was a story the other day about ways summer messes with your health. Now here are seven things that are more likely to KILL you during the summer. 1. Ticks. They're worse than normal this year, and carry at least six different diseases. The big one is Lyme disease, which can cause meningitis if you don't catch it early. 2. Dehydration and heatstroke. Heat waves kill more people each year than tornados, hurricanes, floods, or blizzards. So drink plenty of fluids, and find some shade. 3. Car accidents.