Well...here is the advisory for the heat!

As expected, NWS has put out Air Quality alerts for most of the state and a Excessive Heat Watch for the entire NWS Sterling forecast zone (Below)

NWS Sterling Forecast Zone

Here is the Air Quality Alert text info from NWS Sterling:

...AIR QUALITY ALERT IS IN EFFECT FOR WEDNESDAY JULY 20 2011...

THE METROPOLITAN WASHINGTON COUNCIL OF GOVERNMENTS IN ASSOCIATION
WITH MARYLAND DEPARTMENT OF THE ENVIRONMENT, VIRGINIA DEPARTMENT
OF ENVIRONMENTAL QUALITY, AND DISTRICT DEPARTMENT OF ENVIRONMENT
HAS ISSUED A CODE ORANGE AIR QUALITY ALERT WEDNESDAY FOR
THE DC METRO AREA.

A CODE ORANGE AIR QUALITY ALERT MEANS THAT AIR POLLUTION
CONCENTRATIONS WITHIN THE REGION MAY BECOME UNHEALTHY FOR
SENSITIVE
GROUPS. SENSITIVE GROUPS INCLUDE CHILDREN...PEOPLE SUFFERING FROM
ASTHMA... HEART DISEASE OR OTHER LUNG DISEASES...AND THE ELDERLY.
THE EFFECTS OF AIR POLLUTION CAN BE MINIMIZED BY AVOIDING
STRENUOUS
ACTIVITY OR EXERCISE OUTDOORS.

FOR MORE INFORMATION ON GROUND-LEVEL OZONE AND FINE
PARTICLES...VISIT WWW.CLEANAIRPARTNERS.NET.

Here is the Air Quality Alert text info from NWS Sterling:

1212 PM EDT TUE JUL 19 2011

...EXCESSIVE HEAT WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH
THURSDAY EVENING...

THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON HAS
ISSUED AN EXCESSIVE HEAT WATCH...WHICH IS IN EFFECT FROM THURSDAY
AFTERNOON THROUGH THURSDAY EVENING.

* TEMPERATURE...UPPER 90S TO AROUND 100 DEGREES.

* HEAT INDEX VALUES...BETWEEN 105 AND 110 DEGREES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

AN EXCESSIVE HEAT WATCH MEANS THAT A PROLONGED PERIOD OF HOT
TEMPERATURES IS EXPECTED. THE COMBINATION OF HOT TEMPERATURES AND
HIGH HUMIDITY WILL COMBINE TO CREATE A DANGEROUS 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 NEIGHBORS.