19declarations
12major disasters
7emergencies
1974first on record
2026latest
By hazard
Severe Storm6
Flood4
Snowstorm3
Biological2
Winter Storm1
Hurricane1
Severe Ice Storm1
Tornado1
By decade
11970s
51990s
82000s
52020s
Population: 111,907 in April 2020, 112,951 in July 2024 (Census Bureau estimates).
Declarations naming Delaware County
| Declared | Number | Title | Hazard | Programs | Federal aid |
|---|---|---|---|---|---|
| Aug 25, 2026 | DR-4933-IN | Severe Storms, Straight-Line Winds, Tornadoes, and Flooding | Flood | IHPPA | $169.0 million |
| Aug 15, 2026 | EM-3651-IN | Severe Storms, Straight-Line Winds, Tornadoes, and Flooding | Flood | PA | — |
| Jan 24, 2026 | EM-3641-IN | Severe Winter Storm | Winter Storm | PA | — |
| Apr 3, 2020 | DR-4515-IN | COVID-19 Pandemic | Biological | IHPPAHM | $372.6 million |
| Mar 13, 2020 | EM-3456-IN | COVID-19 | Biological | PA | — |
| Mar 12, 2007 | EM-3274-IN | Snow | Snowstorm | PA | $9.1 million |
| Sep 10, 2005 | EM-3238-IN | Hurricane Katrina Evacuation | Hurricane | PA | $2.1 million |
| Jan 21, 2005 | DR-1573-IN | Severe Winter Storms and Flooding | Severe Storm | IHPIAPAHM | $33.0 million |
| Jan 11, 2005 | EM-3197-IN | Snow | Snowstorm | PA | $5.8 million |
| Jun 3, 2004 | DR-1520-IN | Severe Storms, Tornadoes, and Flooding | Severe Storm | IHPIAPAHM | $9.6 million |
| Sep 5, 2003 | DR-1487-IN | Severe Storms, Tornadoes, and Flooding | Severe Storm | IHPIAHM | $8.9 million |
| Jul 11, 2003 | DR-1476-IN | Severe Storms, Tornadoes, and Flooding | Severe Storm | IHPIAPAHM | $21.8 million |
| Sep 25, 2002 | DR-1433-IN | Severe Storms and Tornadoes | Severe Storm | IAPAHM | $4.2 million |
| Jan 15, 1999 | EM-3135-IN | In-Winter Storm 12/23/98 | Snowstorm | PA | $9.8 million |
| Apr 2, 1996 | DR-1109-IN | Blizzard of 96 | Flood | PA | — |
| Sep 18, 1992 | DR-962-IN | Severe Storms, Tornadoes & Flooding | Severe Storm | PA | — |
| Mar 29, 1991 | DR-899-IN | Severe Ice Storm | Severe Ice Storm | PA | — |
| Jan 5, 1991 | DR-891-IN | Severe Storms & Flooding | Flood | IAPA | — |
| Apr 4, 1974 | DR-423-IN | Tornadoes | Tornado | IAPA | — |