Extreme Heat Warning for Southeast Louisiana and Southern Mississippi
This alert is no longer in effect.
NOAA issued it on August 17, 2026, 6 days ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
An Extreme Heat Warning remains in effect from 11 AM to 8 PM CDT today with heat index values up to 115 expected across portions of southeast Louisiana and southern Mississippi.
Read this weather record in 30 seconds
- Record type
- Extreme Heat Warning
- Affected area
- Southeast Louisiana and Southern Mississippi
- Issued
- August 17, 2026
- Issuing authority
- NWS New Orleans LA
Heat notices are time-bound and location-specific. Confirm the current forecast and local public-health guidance before relying on this archived record.
Record status: historical. It was issued 6 days ago; use the issuing agency's live warning service for current conditions in Southeast Louisiana and Southern Mississippi.
Alert Details
Extreme Heat Warning issued by NWS New Orleans LA. Effective from 11 AM CDT August 17, 2026 to 8 PM CDT August 17, 2026. Severity: Severe. Certainty: Likely. Urgency: Expected.
Affected Areas
Portions of southeast Louisiana and southern Mississippi including: Pointe Coupee; West Feliciana; East Feliciana; St. Helena; Washington; Iberville; West Baton Rouge; East Baton Rouge; Assumption; St. James; St. John The Baptist; Upper St. Bernard; Lower St. Bernard; Northern Tangipahoa; Southeast St. Tammany; Western Orleans; Eastern Orleans; Northern St. Tammany; Southwestern St. Tammany; Central Tangipahoa; Lower Tangipahoa; Northern Livingston; Southern Livingston; Western Ascension; Eastern Ascension; Upper Jefferson; Upper Plaquemines; Central Plaquemines; Lower Plaquemines; Central Jefferson; Coastal Jefferson; Upper Lafourche; Lower Lafourche; Upper Terrebonne; Lower Terrebonne; Upper St. Charles; Central St. Charles; Lower St. Charles; Wilkinson; Amite; Pike; Walthall; Pearl River; Northern Hancock; Northern Harrison; Northern Jackson; Southern Hancock; Southern Harrison; Southern Jackson.
What You Should Do
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.
Expected Conditions
Dangerously hot conditions with heat index values up to 115 expected.
Timeline
Alert sent at 1:06 AM CDT August 17, 2026. Effective 11 AM CDT to 8 PM CDT August 17, 2026.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,811 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to August 17, 2026.
Frequently Asked Questions
Common questions about this NWS weather alert.