Heat Wave Expands to the East Coast; Flash Flooding Likely in the Central Plains into the Midwest; Severe Thunderstorms in the Northeast

Dangerous, prolonged heat is ongoing in the Mid-South to Mid-Mississippi Valley and heat expands into the Northeast for a brief period today. Widely scattered instances of flash flooding due to heavy rains are forecast from northeast Kansas to much of Indiana. Scattered strong to severe thunderstorms are possible across parts of New England, northern Mid-Atlantic, and North Dakota. Read More >

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Last Map Update: Sun, Jul 27, 2025 at 1:02:21 am CDT

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Heat Advisory Sunday

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A heat advisory graphic from the National Weather Service New Orleans/Baton Rouge, issued on July 26, 2025, at 6:53 PM CDT, warns of dangerous heat on Sunday, July 27. The advisory is in effect from 10 AM to 8 PM CDT, with heat index values up to 110°F. The affected areas include all parishes/counties in southeast Louisiana and southern Mississippi within the County Warning Area, highlighted in orange on the accompanying map. The graphic provides safety recommendations: "Take frequent breaks in the shade or air conditioning," "Drink plenty of water, even if not thirsty," "Check on elderly, ill neighbors, & relatives," and "Bring pets indoors or provide shade & plenty of water." The bottom of the graphic indicates "Elevated Risk of Heat-related Illnesses" and includes the NWS New Orleans/Baton Rouge logo and social media handles.

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Location	Time (CDT)	Weather	Vsby. (SM)	Temp. (ºF)	Dewpt. (ºF)	Hum. (%)	Wind (mph)	Wind Chill / Heat Index (ºF)	Pres. (in)
Baton Rouge LA	23:53	Clear	10	79	76	90	E 3	-	30.11
Biloxi MS	23:55	Clear	10	85	77	75	S 5	96 [HI]	30.10
Gulfport MS	23:53	Clear	10	83	77	82	SSE 5	92 [HI]	30.11
Hammond LA	00:35	Clear	10	77	77	100	CALM	-	30.13
Houma LA	00:35	Clear	10	79	77	92	CALM	-	30.13
McComb MS	11:04	Thunder In The Vicinity \ Lightning Observed	10	84	76	76	SSW 10G23	93 [HI]	30.11
New Orleans LA	23:53	Mostly Clear	10	84	79	84	SE 5	96 [HI]	30.11
Slidell La	23:53	Clear	10	76	75	97	CALM	-	30.12

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Heat Wave Expands to the East Coast; Flash Flooding Likely in the Central Plains into the Midwest; Severe Thunderstorms in the Northeast

Weather Forecast Office New Orleans/Baton Rouge