26declarations
13major disasters
9emergencies
1974first on record
2025latest
By hazard
Fire8
Severe Storm4
Hurricane4
Flood3
Severe Ice Storm2
Biological2
Winter Storm1
Other1
Drought1
By decade
11970s
11980s
41990s
92000s
52010s
62020s
Population: 609,057 in April 2020, 727,480 in July 2024 (Census Bureau estimates).
Declarations naming Williamson County
| Declared | Number | Title | Hazard | Programs | Federal aid |
|---|---|---|---|---|---|
| Jul 6, 2025 | DR-4879-TX | Severe Storms, Straight-Line Winds, and Flooding | Flood | IHPPA | $575.9 million |
| Apr 21, 2023 | DR-4705-TX | Severe Winter Storm | Winter Storm | PAHM | $89.5 million |
| Feb 19, 2021 | DR-4586-TX | Severe Winter Storms | Severe Ice Storm | IHPPAHM | $346.7 million |
| Feb 14, 2021 | EM-3554-TX | Severe Winter Storm | Severe Ice Storm | PA | — |
| Mar 25, 2020 | DR-4485-TX | COVID-19 Pandemic | Biological | IHPPAHM | $14.90 billion |
| Mar 13, 2020 | EM-3458-TX | COVID-19 | Biological | PA | — |
| May 29, 2015 | DR-4223-TX | Severe Storms, Tornadoes, Straight-Line Winds and Flooding | Severe Storm | IHPPAHM | $240.2 million |
| Sep 9, 2011 | DR-4029-TX | Wildfires | Fire | IHPPAHM | $72.9 million |
| Sep 6, 2011 | FM-2963-TX | Moonglow Fire | Fire | PA | $100,775 |
| Aug 15, 2011 | FM-2949-TX | Horseshoe Fire | Fire | PA | $400,386 |
| Jun 16, 2011 | FM-2922-TX | Grand Mesa Fire | Fire | PA | $96,414 |
| Sep 10, 2008 | EM-3294-TX | Hurricane Ike | Hurricane | PA | $562,029 |
| Aug 7, 2008 | FM-2785-TX | Florence Fire | Fire | PA | $162,011 |
| Mar 14, 2008 | EM-3284-TX | Wildfires | Fire | PA | — |
| Jun 29, 2007 | DR-1709-TX | Severe Storms, Tornadoes, and Flooding | Severe Storm | IHPIAPAHM | $99.4 million |
| Jan 11, 2006 | DR-1624-TX | Extreme Wildfire Threat | Fire | IHPIAPAHM | $37.4 million |
| Sep 24, 2005 | DR-1606-TX | Hurricane Rita | Hurricane | IHPIAPAHM | $1.08 billion |
| Sep 21, 2005 | EM-3261-TX | Hurricane Rita | Hurricane | PA | $6.3 million |
| Sep 2, 2005 | EM-3216-TX | Hurricane Katrina Evacuation | Hurricane | PA | $519.0 million |
| Feb 1, 2003 | EM-3171-TX | Loss of the Space Shuttle Columbia | Other | PA | $6.1 million |
| Sep 1, 1999 | EM-3142-TX | Extreme Fire Hazards | Fire | PA | $6.2 million |
| Aug 26, 1998 | DR-1239-TX | Tropical Storm Charley | Severe Storm | IAPAHM | $12.1 million |
| Sep 10, 1993 | EM-3113-TX | Extreme Fire Hazard | Drought | PA | — |
| Dec 26, 1991 | DR-930-TX | Severe Thunderstorms | Flood | IAPA | — |
| May 19, 1989 | DR-828-TX | Severe Storms, Tornadoes & Flooding | Severe Storm | IAPA | — |
| Nov 30, 1974 | DR-454-TX | Severe Storms & Flooding | Flood | IAPA | — |