News & Events

Hurricane Sally Rainfall and Storm Surge has impacts in Mississippi, Alabama, and Florida

September 23 2020

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



Hurricane Sally made landfall on September 16 at 1:30 am CDT near Gulf Shores, Alabama, as a Category 2 hurricane with winds raging at 100 mph. In addition to high winds, the storm produced over 30 inches of rain in some areas of Florida and Alabama.  Severe flooding has been exacerbated by Sally’s slinking speed.  The National Hurricane Center published Hurricane Sally storm surge maps for the affected states. We combined the National Hurricane Center's Storm Surge data with Envirosite's 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 Alabama are in Mobile County. For Mississippi, the highest number of contaminated sites at risk are in Jackson County. For Florida, the highest number of contaminated sites at risk are in Bay, Escambia, Okaloosa, and Santa Rosa Counties.


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


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


The affected area maps are available for Alabama, Florida, and Mississippi. 

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



Hurricane Laura Sites kmz 


Alabama Counts

Florida Counts

Mississippi Counts





Superfund NPL, NPL-Related 56 36 17
State Hazardous Waste sites 21 692 52
Brownfields 6 19 7
Spills, Other contaminated sites 751 1655 41
RCRA Regulated sites 159 111 22
Above Ground Storage Tanks (bulk storage) 110 309 2
Gas Stations and Underground Storage Tanks 210 550 78
Other potentially contaminated sites 43 623 1


Hurricane Laura Inundation kmz

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