IN SUMMER HEAT, COOL HEADS PREVAIL.

• Position: Brief Article

Your shirt is stuck to you; your hair is matted against your face; and the pavement is burning right through your shoes, but how do you feel psychologically? Probably not so wonderful, suggests Frank Farley, a psychologist at Temple University, Philadelphia, Pa. "There is some evidence that various types of weather can influence our moods--especially very hot or very cold weather. Incidents that people might otherwise be able to shoulder in other weather will provoke them when it's hot. People do get testy."

While the heat can get folks down, those who are forced to stay inside can also suffer. "Because...