Heat Advisory
URGENT – WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
1236 PM EDT Fri Jul 21 2017
District of Columbia-Southern Baltimore-Prince Georges-
Anne Arundel-Charles-St. Marys-Calvert-
Central and Southeast Montgomery-Central and Southeast Howard-
Southeast Harford-Albemarle-Greene-Madison-Orange-Culpeper-
Prince William/Manassas/Manassas Park-Fairfax-
Arlington/Falls Church/Alexandria-Stafford-Spotsylvania-
King George-Southern Fauquier-Eastern Loudoun-
Including the cities of Washington, Baltimore, Bowie,
Suitland-Silver Hill, Clinton, College Park, Greenbelt, Laurel,
Camp Springs, Glen Burnie, Annapolis, Severn, South Gate,
Severna Park, Arnold, Odenton, St. Charles, Waldorf,
Lexington Park, California, Chesapeake Beach, Huntingtown,
Dunkirk, North Beach, Lusby, Prince Frederick, Bethesda,
Rockville, Gaithersburg, Silver Spring, Columbia, Ellicott City,
Aberdeen, Charlottesville, Stanardsville, Madison, Orange,
Gordonsville, Culpeper, Dale City, Manassas, Woodbridge,
Lake Ridge, Montclair, Reston, Herndon, Annandale, Centreville,
Chantilly, McLean, Franconia, Arlington, Alexandria, Falmouth,
Fredericksburg, Dahlgren, Turnbull, Leesburg, Ashburn,
and Sterling
1236 PM EDT Fri Jul 21 2017
…HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING…
* HEAT INDEX VALUES…Up to 106 due to temperatures in the mid
90s, and dewpoints around 70.
* IMPACTS…The heat and humidity may cause heat stress during
outdoor exertion or extended exposure.
PRECAUTIONARY/PREPAREDNESS ACTIONS…
A Heat Advisory means that a period of high temperatures is
expected. The combination of high temperatures and high humidity
will create a situation in which heat illnesses are possible.
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 911.
