update from the NWS

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

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED AN EXCESSIVE HEAT WATCH... WHICH IS IN EFFECT FROM MONDAY AFTERNOON THROUGH THURSDAY AFTERNOON.

VERY HOT CONDITIONS ARE EXPECTED ACROSS WESTERN WASHINGTON THIS WEEK WITH HIGH TEMPERATURES IN THE 90S... ESPECIALLY ACROSS THE INTERIOR. NIGHTTIME TEMPERATURES WILL ALSO BE QUITE WARM... IN THE UPPER 50S TO MID 60S... BRINGING NO RELIEF FROM THE HEAT. THE AIR MASS WILL FEEL MUGGY AND UNCOMFORTABLE WITH DEW POINT TEMPERATURES ALSO IN THE MID 50S TO LOWER 60S. THIS HEAT WAVE MAY PERSIST THROUGH THURSDAY WITH ONLY A MODEST COOL DOWN ON FRIDAY WITH HIGHS BACK INTO THE 80S. IT IS RARE FOR SEVERAL HOT DAYS IN A ROW FOR WESTERN WASHINGTON AS IS THE CASE HERE. IN ADDITION... THIS WEATHER PATTERN MAY ALSO LEAD TO DETERIORATING AIR QUALITY ACROSS THE REGION.

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.