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The peak of the heat looks to be Friday as of now, although each day Wednesday through at least Saturday has potential to be dangerously hot. All may shoot for near and beyond 100 degrees, and with the humidity it could feel as hot as 105 to 115. Heat advisories are probable as soon as Wednesday with the most significant extreme heat warnings currently anticipated after that.One particular model shown below, which is actually a blend of various models, forecasts highs of 101, 104, 106, 104, 98, and 97 Wednesday through Monday. Both the European and American models are predicting highs up to 110 degrees, but they can sometimes overestimate by a few degrees.
URGENT - WEATHER MESSAGENational Weather Service Baltimore MD/Washington DC225 PM EDT Tue Jun 30 2026DCZ001-MDZ004>006-008-011-013-014-016-503>508-VAZ039-040-050-051-053>057-501-502-505-506-526-527-010230-/O.CON.KLWX.HT.Y.0004.260701T1500Z-260702T0000Z//O.CON.KLWX.XH.A.0001.260702T1500Z-260704T0000Z/District of Columbia-Frederick-Carroll-Northern Baltimore-Cecil-Southern Baltimore-Prince Georges-Anne Arundel-Charles-NorthwestMontgomery-Central and Southeast Montgomery-Northwest Howard-Central and Southeast Howard-Northwest Harford-Southeast Harford-Madison-Rappahannock-Orange-Culpeper-Fairfax-Arlington/FallsChurch/Alexandria-Stafford-Spotsylvania-King George-NorthernFauquier-Southern Fauquier-Western Loudoun-Eastern Loudoun-Northwest Prince William-Central and Southeast PrinceWilliam/Manassas/Manassas Park-225 PM EDT Tue Jun 30 2026...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM TO 8 PM EDTWEDNESDAY......EXTREME HEAT WATCH REMAINS IN EFFECT FROM THURSDAY MORNINGTHROUGH FRIDAY EVENING...* WHAT...For the Heat Advisory, heat index values of 105 to 109 expected. For the Extreme Heat Watch, dangerously hot conditions with heat index values around 110 possible.* WHERE...DC, and portions of central, north central, northeast, northern, and southern Maryland, and central, northern, and northwest Virginia.* WHEN...For the Heat Advisory, from 11 AM to 8 PM EDT Wednesday. For the Extreme Heat Watch, from Thursday morning through Friday evening.* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.* ADDITIONAL DETAILS...Heat index values may approach 115 in spots near and east of Interstate 95 Thursday afternoon and Friday afternoon, especially near larger bodies of water. Dangerous heat may linger into Saturday. Prolonged extreme heat could impact power, water, and transportation systems.
The Weather Channel announced that the spectacular Independence Day fireworks on July 4th will be delayed from 9 PM until 11 PM, due to the anticipated high heat. They are also predicting thunderstorms.
There’s a political event scheduled for 9. With the weather and the sheer amount of fireworks scheduled to be launched, the weather folks are saying the show will likely be a large smoke cloud as in a few past years.
