Why do I care? Heat waves can potentially worsen drought conditions, which can be devastating to growers and crops. The increased temperatures will cause the crops to dry out through evaporation and decrease the available food supply. Heat waves can also impact energy demands on consumers and leave some populations without a cooling mechanism because of the increased use of air conditioners. The severe heat stress can affect animal health as well as human health and potentially lead to an increase in human and animal mortality if cool areas are not available.