If you can stand the heat and high humidity for 47 days, relief is in sight. I’ve targeted mid-September as a time for temperature and humidity changes. Studies suggest increased heat can increase aggression. The Heat Island Effect is caused by higher populations, increased construction and rising energy consumption, resulting in temperature increases by 15 degrees at night. Four years ago, the American Automobile Association conducted a study by positioning cars at red lights during extreme heat. The drivers were instructed to ignore light changes while reactions were monitored. Other studies have found a correlation between hotter weather and elevated crime rates. The New York Times reported a study by the Centers for Disease Control determined homicides swell between July and September. Fastcast: Sizzling.