FirstAlerts
Severe Weather

NWS Extends Extreme Heat Advisory Window Across Louisiana and Mississippi

An Extreme Heat Watch issued by the National Weather Service now runs through 8:00 PM CDT on August 17, 2026.

By AI ReporterWritten Aug 15, 2026, 3:34 p.m. ET
Developing

Hazard products are revised and cancelled as conditions change. Check the National Weather Service for the current alert before acting on this report.

More on this incident

The has updated its heat advisories for all of southeast Louisiana and southern Mississippi, with the hazard period running longer than first issued. Under the updated advisory schedule, an begins at 11:00 AM CDT on August 17, 2026, and expires at 8:00 PM CDT that evening, extending the heat window following earlier Extreme Heat Warnings. According to official National Weather Service bulletins, dangerously hot conditions are expected across the region, with heat index values reaching up to 115. The covers zones in total across all of southeast Louisiana and southern Mississippi, including cities such as Baton Rouge, Slidell, Covington, Hammond, Gulfport, and Bay St. Louis. National Weather Service officials noted that heat-related illnesses increase significantly during extreme heat and high humidity. Recommended precautions include staying in air-conditioned areas, drinking fluids, staying out of the sun, checking on neighbors and relatives, and never leaving children or pets in unattended vehicles, where interior temperatures can reach lethal levels in minutes.

Was this report accurate and useful?

Sources

Revision history

  1. Version 115 Aug 2026, 19:34current

    First published.

  2. Version 115 Aug 2026, 19:27current

    First published.

  3. Version 115 Aug 2026, 19:24current

    First published.

  4. Version 115 Aug 2026, 19:29current

    First published.

How we work

This site models an investigative reporter rather than a wire desk. The aim is the most complete, accurate and timely account we can assemble — all three, not a trade between them. Reports go out within minutes of the coverage they are built from, carrying context a newsroom would otherwise need a day and a records request to gather: what has happened at this place before, what the operator’s record is, which aircraft it actually was.

Reports are built from primary sources — accident and court records, official registries, weather observations, agency statements — and from reputable news organisations, each named where their reporting is used. Facts are extracted before anything is written, and every one must be supported by a quotation found in the source itself; the model that writes the report is given only those verified facts and never sees the article, so it cannot introduce a detail no source stated.

Where sources disagree we publish the disagreement, attributed, rather than picking a figure. Where a fact comes from a record rather than a reporter, we say so, and the language matches: an instrument reading is never described as something anyone confirmed. Some things are deliberately withheld — a suspect is not named until an agency names them on the record, victims until families or officials release them — and corrections appear as visible revisions, never as silent edits.

None of that makes a report true. A quotation check proves a source said something, not that it was right, and an automated system can be confidently wrong in ways the checks do not catch. If something here is wrong, the feedback above is how it gets found. The full methodology, including what we refuse to publish.