News & Events

Hurricane Delta Winds and Storm Surge impacts in Texas, Louisiana, and Mississippi

October 15 2020

Envirosite Provides Environmental Data to
Aid in Hurricane Delta Cleanup Efforts.



Hurricane Delta made landfall on October 9th at 6 pm CDT near Creole, Louisiana as a Category 2 hurricane with winds raging at 100 mph. This is the same area where Hurricane Laura passed in September leaving piles of wreckage and blue tarped rooftops.  Hurricane Delta is the 10th storm to hit the United States this year.   The National Hurricane Center published Hurricane Delta storm surge maps for the affected states. Envirosite combined the National Hurricane Center's Storm Surge data with our comprehensive environmental and geospatial data sets to help aid public officials and environmental professionals.

Envirosite's Storm Surge impact analysis indicates the highest number of contaminated sites at risk of flooding in Louisiana are in Calcasieu, Terrebonne, Lafourche, Vermilion, St. Charles Counties. For Mississippi, the highest number of contaminated sites at risk are in Hancock and Harrison Counties. For Texas, the highest number of contaminated sites at risk are in Jefferson and Orange Counties.


Figure 1:  Map showing Contaminated Sites for the Hurricane Delta inundation areas


Figure 2:  Map showing Potentially Contaminated Sites for the Hurricane Delta inundation areas 


The affected area maps are available for Louisiana, Texas, and Mississippi. 

The Envirosite contaminated and regulated sites data related to Hurricane Delta can be downloaded here.



Hurricane Delta Sites


Louisiana Counts

Texas Counts

Mississippi  Counts





Superfund NPL, NPL-Related 287 64 8
State Hazardous Waste sites 151 17 15
Brownfields 29 1 0
Spills, Other contaminated sites 11,087 81 28
RCRA Regulated sites 1,064 94 9
Above Ground Storage Tanks (bulk storage) 44 57 0
Gas Stations and Underground Storage Tanks 1,393 212 50
Other potentially contaminated sites 58 296 1
State Totals 14,113 822 111


Hurricane Delta Inundation

Here is the legend for the NHC Potential Storm Surge Flooding Map

1 = 0 to 1 foot above ground
2 = Greater than 1 foot above ground
3 = Greater than 3 feet above ground
4 = Greater than 6 feet above ground
5 = Greater than 9 feet above ground



Questions may be directed to Niem Tash,
Data Initiatives Manager at