For the third straight day, the National Weather Service (NWS) has issued a heat advisory for most of Louisiana. It's not really a surprise, but it should be an eye-opener for you if you have elderly neighbors or friends without air conditioning. The NWS said -- just like earlier in the week -- we should expect a heat index betwen 108 and 112 degrees, especially 1 p.m. That can be devastating, even in the shade. Here's how you can recognize heat stroke or heat exhaustion. Don't overdo it, okay?

Infants, the elderly, athletes, and outdoor workers are the groups at greatest risk for heat stroke. What are the symptoms of heat exhaustion or heat stroke? Individuals with heat exhaustion tend to have symptoms such as:

  • Profuse sweating,
  • Weakness,
  • Muscle cramps,
  • Headache
  • Nausea and vomiting.

As dehydration increases from the loss of body water, lightheadedness may occur and fainting (syncope) may occur especially, if the affected individual stands up quickly (orthostatic hypotension). A low grade fever also may be present.

What are the symptoms of heat stroke

  • Nausea,
  • Vomiting,
  • Fatigue,
  • Weakness,
  • Headache,
  • Muscle cramps and aches, and
  • Dizziness.

via Heat Exhaustion Symptoms, Causes, Treatment - What are the symptoms of heat exhaustion on MedicineNet.