Late July in Alabama is always hot, but temperatures today have the potential to be especially brutal.  The National Weather Service in Birmingham's forecast for the day calls for a 20% chance of showers and a high of 99. Combine the humidity with the high temp--and the heat index this afternoon could reach 107.

The National Weather Service issued the following Heat Advisory in effect until 9 p.m. tonight:

...HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT THIS EVENING...

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A HEAT
ADVISORY...WHICH IS IN EFFECT UNTIL 9 PM CDT THIS EVENING.

* TEMPERATURES...WILL BE IN THE MID TO UPPER 90S.

* HEAT INDICES...WILL RISE TO 105-107 DEGREES.

* IMPACTS...ELEVATED RISK OF HEAT STRESS AND HEAT RELATED
  ILLNESSES...SUCH AS HEAT EXHAUSTION AND HEAT STROKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN
POSSIBLE, RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR
EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT
STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN
POSSIBLE AND DRINK PLENTY OF WATER.

TO REDUCE RISK DURING OUTDOOR WORK, THE OCCUPATIONAL SAFETY AND
HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS
IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT
SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN
EMERGENCY, CALL 9 1 1.

A HEAT ADVISORY MEANS THAT A PERIOD OF HOT TEMPERATURES IS
EXPECTED. THE COMBINATION OF HOT TEMPERATURES AND HIGH HUMIDITY
WILL COMBINE TO CREATE A SITUATION IN WHICH HEAT ILLNESSES ARE
POSSIBLE. DRINK PLENTY OF FLUIDS, STAY IN AN AIR-CONDITIONED ROOM,
STAY OUT OF THE SUN, AND CHECK UP ON RELATIVES AND CHECK UP ON
RELATIVES AND NEIGHBORS.