The U.S. Government is closed. This site will not be updated; however NOAA websites and social media channels necessary to protect lives and property will be maintained. To learn more, visit www.commerce.gov. For the latest forecast and critical weather information, visit www.weather.gov. 

The U.S. government is closed. This site will not be updated; however, NOAA websites and social media channels necessary to protect lives and property will be maintained. To learn more, visit commerce.gov. 

For the latest forecasts and critical weather information, visit weather.gov.

NCCOS-funded scientists measure a 4,402 square mile, smaller than expected dead zone in the Gulf.

Map off the coast of Louisiana with red polygon indicating the dead zone. and a chart showing the annual area from 1985 to 2025

Just in! NCCOS-funded scientists measure a 4,402 square mile, smaller than expected dead zone in the Gulf. Annual mapping of the zone has been ongoing since 1985. Learn more: https://coastalscience.noaa.gov/news/below-average-summer-2025-dead-zone-measured-in-gulf/