Governor's Office of Homeland Security and Emergency Preparedness - State of LouisianaSince 1990, the Governor’s Office of Homeland Security & Emgergency Preparedness has coordinated several hundred State Disaster Declarations authorized under the Governor's signature. The GOHSEP staff is poised and ready to serve the people of Louisiana at a moment’s notice.
Heat Index


INFORMATION

  • Heat kills by pushing the human body beyond its limits. Under normal conditions, the body's internal thermostat produces perspiration that evaporates and cools the body. However, in the extreme heat and high humidity common in Louisiana, evaporation is slowed and the body must work extra hard to maintain a normal temperature.

  • Most heat disorders occur because the victim has been overexposed to heat or has over exercised for his or her age and physical condition. Other conditions that can induce heat-related illnesses include stagnant atmospheric conditions and poor air quality.

  • A prolonged drought can have a serious economic impact on a community. Increased demand for water and electricity may result in shortages of resources. Moreover, food shortages may occur if agricultural production is damaged or destroyed by a loss of crops or livestock.

WHAT IS EXTREME HEAT?

Temperatures that hover 10 degrees or more above the average high temperature for the region and last for several weeks are defined as extreme heat. Humid or muggy conditions, which add to the discomfort of high temperatures, occur when a "dome" of high atmospheric pressure traps hazy, damp air near the ground. Excessively dry and hot conditions can provoke dust storms and low visibility. Droughts occur when a long period passes without substantial rainfall. A heat wave combined with a drought is a very dangerous situation.