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Extreme Heat Warning — St. James, LA, St. John The Baptist, LA, Upper St. Bernard, LA, Southeast St. Tammany, LA, Western Orleans, LA, Eastern Orleans, LA, Northern St. Tammany, LA, Southwestern St. Tammany, LA, Central Tangipahoa, LA, Lower Tangipahoa, LA, Northern Livingston, LA, Southern Livingston, LA, Western Ascension, LA, Eastern Ascension, LA, Upper Jefferson, LA, Upper Plaquemines, LA, Central Jefferson, LA, Upper St. Charles, LA, Central St. Charles, LA, Lower St. Charles, LA, Northern Hancock, MS, Northern Harrison, MS, Northern Jackson, MS, Southern Hancock, MS, Southern Harrison, MS, Southern Jackson, MS
Issued
11:00 AM CDT · Tue, Aug 18 2026
Expires
8:00 PM CDT · Tue, Aug 18 2026
Issuing Office
NWS KLIX

Affected Areas

St. James, LA St. John The Baptist, LA Upper St. Bernard, LA Southeast St. Tammany, LA Western Orleans, LA Eastern Orleans, LA Northern St. Tammany, LA Southwestern St. Tammany, LA Central Tangipahoa, LA Lower Tangipahoa, LA Northern Livingston, LA Southern Livingston, LA Western Ascension, LA Eastern Ascension, LA Upper Jefferson, LA Upper Plaquemines, LA Central Jefferson, LA Upper St. Charles, LA Central St. Charles, LA Lower St. Charles, LA Northern Hancock, MS Northern Harrison, MS Northern Jackson, MS Southern Hancock, MS Southern Harrison, MS Southern Jackson, MS

Official Bulletin

* WHAT...Dangerously hot conditions with heat index values up to 115
expected.

* WHERE...Portions of southeast Louisiana and southern Mississippi.

* WHEN...For the first Extreme Heat Warning, until 8 PM CDT this
evening. For the second Extreme Heat Warning, from 11 AM to 8 PM
CDT Tuesday.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat and high humidity events.

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.