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Flood in Pima County, Arizona

568 floods and flash floods events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.

568 events · 22 deaths recorded · peak month July · county share of state 14.6%

2026-06-17: Flood2026-06-17: Flood2026-06-17: Flood2026-06-17: Flood2025-10-12: Flood2025-10-12: Flood2025-10-12: Flood2025-10-12: Flood2025-10-12: Flood2025-10-12: Flood2025-10-12: Flood2025-10-12: Flood2025-10-12: Flood2025-10-12: Flood2025-09-25: Flood2025-09-18: Flood2025-09-18: Flood2025-09-17: Flood2025-09-06: Flood2025-08-25: Flood2025-08-16: Flood2025-08-16: Flood2025-08-16: Flood2025-07-31: Flood2025-07-22: Flood2025-07-22: Flood2025-07-16: Flood2025-07-16: Flood2025-07-15: Flood2025-07-03: Flood2025-07-03: Flood2025-07-03: Flood2024-08-23: Flood2024-08-23: Flood2024-08-22: Flood2024-08-08: Flood2024-08-08: Flood2024-08-07: Flood2024-08-03: Flood2024-07-31: Flood2024-07-25: Flood2024-07-25: Flood2024-07-25: Flood2024-07-21: Flood2024-07-14: Flood2024-06-22: Flood2024-04-01: Flood2023-08-30: Flood2023-07-31: Flood2023-07-31: Flood2023-07-17: Flood2023-01-17: Flood2022-09-28: Flood2022-09-12: Flood2022-09-11: Flood2022-08-25: Flood2022-08-25: Flood2022-08-24: Flood2022-08-24: Flood2022-08-23: Flood2022-08-20: Flood2022-08-20: Flood2022-08-20: Flood2022-08-19: Flood2022-08-19: Flood2022-08-19: Flood2022-08-13: Flood2022-08-12: Flood2022-08-12: Flood2022-08-10: Flood2022-08-09: Flood2022-08-09: Flood2022-08-07: Flood2022-07-31: Flood2022-07-31: Flood2022-07-31: Flood2022-07-30: Flood2022-07-28: Flood2022-07-26: Flood2022-07-26: Flood2022-07-24: Flood2022-07-24: Flood2022-07-24: Flood2022-07-24: Flood2022-07-01: Flood2022-07-01: Flood2022-07-01: Flood2022-06-30: Flood2022-06-23: Flood2021-08-31: Flood2021-08-28: Flood2021-08-28: Flood2021-08-17: Flood2021-08-17: Flood2021-08-17: Flood2021-08-17: Flood2021-08-17: Flood2021-08-16: Flood2021-08-14: Flood2021-08-12: Flood2021-08-11: Flood2021-08-11: Flood2021-08-10: Flood2021-08-10: Flood2021-08-10: Flood2021-08-10: Flood2021-08-10: Flood2021-08-10: Flood2021-08-06: Flood2021-08-02: Flood2021-08-02: Flood2021-07-30: Flood2021-07-30: Flood2021-07-30: Flood2021-07-29: Flood2021-07-27: Flood2021-07-27: Flood2021-07-25: Flood2021-07-25: Flood2021-07-25: Flood2021-07-25: Flood2021-07-24: Flood2021-07-23: Flood2021-07-23: Flood2021-07-23: Flood2021-07-22: Flood2020-07-23: Flood2018-10-02: Flood2018-10-02: Flood2018-10-02: Flood2018-08-12: Flood2018-07-10: Flood2017-08-23: Flood2016-08-09: Flood2016-08-02: Flood2016-07-01: Flood2016-06-26: Flood2014-10-08: Flood2014-09-08: Flood2014-07-09: Flood2013-09-10: Flood2013-07-20: Flood2012-09-07: Flood2012-09-06: Flood2012-09-06: Flood2012-08-17: Flood2012-07-29: Flood2012-07-04: Flood2011-09-15: Flood2011-09-15: Flood2011-08-18: Flood2011-07-07: Flood2010-07-30: Flood2010-07-30: Flood2009-06-30: Flood2008-08-03: Flood2008-07-19: Flood2008-01-27: Flood2007-08-04: Flood2007-07-31: Flood2007-07-31: Flood2007-07-28: Flood2005-08-23: Flood2005-08-14: Flood2005-08-02: Flood2005-07-27: Flood
Flood event locations in and around Pima County. Dots: Flood event locations in the kept record. Boundaries: US Census Bureau.

NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. Storm records through 30 Jun 2026.

Pima County, Arizona, has 568 flood events in the NCEI record since 1950, with at least one in 31 different years.

July is the busiest month, with 236 of the recorded events. The last 20 years account for 384 events against 184 in the 20 years before, a change that reflects reporting practice as much as weather.

The county holds 14.6% of the 3,896 flood events recorded in Arizona; its 6.2 per 100 square miles compares with 3.4 statewide.

NCEI attributes 22 deaths in the county to floods and flash floods.

Compared with Arizona

MeasurePima CountyArizonaUS
Flood events since 19505683,896183,559
Per 100 square miles6.23.45.2
Per 10,000 residents5.45.45.5
Deaths recorded221272,961
Busiest monthJulyAugustJune

By year

195019882026
Flood events recorded in Pima County per year, 1950 to 2026 (2026 is partial).

Seasonality

Jan
6Feb
3Mar
0Apr
2May
1Jun
17Jul
236Aug
216Sep
62Oct
23Nov
2Dec
0
Flood events in Pima County by month of occurrence, all years.

Recorded events

The 185 events kept for this page are the 120 most recent plus the 80 with the most damage, deaths or injuries out of 568. Magnitude is hail size, tornado rating or wind speed as recorded.

DateEvent typeMagnitudeProperty damageCrop damageDeathsInjuriesGeography
17 Jun 2026Flash Flood—$5K—12County
17 Jun 2026Flash Flood—$5K———County
17 Jun 2026Flash Flood—$3K———County
17 Jun 2026Flash Flood—$5K———County
12 Oct 2025Flash Flood—————County
12 Oct 2025Flash Flood—$50K———County
12 Oct 2025Flash Flood—$50K———County
12 Oct 2025Flash Flood—$30K———County
12 Oct 2025Flash Flood—$1K———County
12 Oct 2025Flash Flood—$1K———County
12 Oct 2025Flash Flood—$1K———County
12 Oct 2025Flash Flood—$50K———County
12 Oct 2025Flash Flood—$1K———County
12 Oct 2025Flash Flood—$30K———County
25 Sep 2025Flash Flood—$30K———County
18 Sep 2025Flash Flood—$30K———County
18 Sep 2025Flash Flood—$30K———County
17 Sep 2025Flash Flood—$500———County
6 Sep 2025Flash Flood—$2K———County
25 Aug 2025Flash Flood—$1K———County
16 Aug 2025Flash Flood—$5K———County
16 Aug 2025Flash Flood—$1K———County
16 Aug 2025Flash Flood—$1K———County
31 Jul 2025Flash Flood—$500———County
22 Jul 2025Flash Flood—————County
22 Jul 2025Flash Flood—$500———County
16 Jul 2025Flood—$1K———County
16 Jul 2025Flood—$1K———County
15 Jul 2025Flash Flood—$2K———County
3 Jul 2025Flash Flood—$2K———County
3 Jul 2025Flash Flood—$1K———County
3 Jul 2025Flash Flood—$4K———County
23 Aug 2024Flash Flood—$1K———County
23 Aug 2024Flash Flood—$1K———County
22 Aug 2024Flash Flood—$1K———County
8 Aug 2024Flash Flood—$1K———County
8 Aug 2024Flash Flood—$1K—1—County
7 Aug 2024Flash Flood—$1K———County
3 Aug 2024Flash Flood—$1K———County
31 Jul 2024Flash Flood—$5K———County
25 Jul 2024Flash Flood—$25K———County
25 Jul 2024Flash Flood—$1K———County
25 Jul 2024Flash Flood—$1K———County
21 Jul 2024Flash Flood—$5K———County
14 Jul 2024Flash Flood—$10K———County
22 Jun 2024Flash Flood—$10K—2—County
1 Apr 2024Flood—$15K———County
30 Aug 2023Flash Flood—————County
31 Jul 2023Flash Flood—————County
31 Jul 2023Flash Flood—————County
17 Jul 2023Flash Flood—————County
17 Jan 2023Flood—————County
28 Sep 2022Flash Flood—————County
12 Sep 2022Flash Flood—————County
11 Sep 2022Flash Flood—————County
25 Aug 2022Flash Flood—————County
25 Aug 2022Flash Flood—$3K———County
24 Aug 2022Flash Flood—$10K———County
24 Aug 2022Flash Flood—————County
23 Aug 2022Flash Flood—$10K———County
20 Aug 2022Flash Flood—$10K———County
20 Aug 2022Flash Flood—————County
20 Aug 2022Flash Flood—————County
19 Aug 2022Flash Flood—————County
19 Aug 2022Flash Flood—————County
19 Aug 2022Flash Flood—————County
13 Aug 2022Flash Flood—————County
12 Aug 2022Flash Flood—————County
12 Aug 2022Flash Flood—$25K———County
10 Aug 2022Flash Flood—————County
9 Aug 2022Flash Flood—————County
9 Aug 2022Flash Flood—————County
7 Aug 2022Flash Flood—$25K———County
31 Jul 2022Flash Flood—$3.0M———County
31 Jul 2022Flash Flood—————County
31 Jul 2022Flash Flood—————County
30 Jul 2022Flash Flood—————County
28 Jul 2022Flash Flood—————County
26 Jul 2022Flash Flood————1County
26 Jul 2022Flash Flood—————County
24 Jul 2022Flash Flood—$5K———County
24 Jul 2022Flash Flood—————County
24 Jul 2022Flash Flood—————County
24 Jul 2022Flash Flood—————County
1 Jul 2022Flash Flood—————County
1 Jul 2022Flash Flood—————County
1 Jul 2022Flash Flood—$500———County
30 Jun 2022Flash Flood—————County
23 Jun 2022Flash Flood—————County
31 Aug 2021Flood—————County
28 Aug 2021Flash Flood—————County
28 Aug 2021Flood—————County
17 Aug 2021Flash Flood—$1K———County
17 Aug 2021Flood—$50K———County
17 Aug 2021Flash Flood—$3K———County
17 Aug 2021Flash Flood—————County
17 Aug 2021Flash Flood—————County
16 Aug 2021Flash Flood—————County
14 Aug 2021Flash Flood—$3K———County
12 Aug 2021Flash Flood—————County
11 Aug 2021Flash Flood—————County
11 Aug 2021Flash Flood—————County
10 Aug 2021Flash Flood—$1K———County
10 Aug 2021Flash Flood—————County
10 Aug 2021Flash Flood—$250K———County
10 Aug 2021Flash Flood—$10K———County
10 Aug 2021Flash Flood—————County
10 Aug 2021Flash Flood—————County
6 Aug 2021Flash Flood—————County
2 Aug 2021Flash Flood—$2K———County
2 Aug 2021Flash Flood—$5K———County
30 Jul 2021Flash Flood—$5K———County
30 Jul 2021Flash Flood—————County
30 Jul 2021Flash Flood—————County
29 Jul 2021Flash Flood—————County
27 Jul 2021Flash Flood—————County
27 Jul 2021Flash Flood—————County
25 Jul 2021Flash Flood—————County
25 Jul 2021Flash Flood—————County
25 Jul 2021Flash Flood—————County
25 Jul 2021Flash Flood—$50K———County
24 Jul 2021Flash Flood—$50K———County
23 Jul 2021Flash Flood—$500K———County
23 Jul 2021Flash Flood—$250K———County
23 Jul 2021Flood—$200K———County
22 Jul 2021Flash Flood—$350K———County
23 Jul 2020Flash Flood—$50K—1—County
2 Oct 2018Flood—$3.0M———County
2 Oct 2018Flash Flood—$500K———County
2 Oct 2018Flash Flood—$250K———County
12 Aug 2018Flash Flood—$15K—1—County
10 Jul 2018Flash Flood—$4.0M———County
23 Aug 2017Flash Flood————1County
9 Aug 2016Flash Flood—$200K———County
2 Aug 2016Flash Flood—$25K———County
1 Jul 2016Flash Flood—$100K———County
26 Jun 2016Flash Flood—$25K———County
8 Oct 2014Flood—$25K———County
8 Sep 2014Flash Flood—$25K—1—County
9 Jul 2014Flash Flood—$100K———County
10 Sep 2013Flood—$25K———County
20 Jul 2013Flash Flood—$20K——1County
7 Sep 2012Flood—$20K—11County
6 Sep 2012Flash Flood—$40K———County
6 Sep 2012Flash Flood—$30K———County
17 Aug 2012Flash Flood—$20K——1County
29 Jul 2012Flash Flood—$250K———County
4 Jul 2012Flash Flood—$50K———County
15 Sep 2011Flash Flood—$500K—1—County
15 Sep 2011Flash Flood—$1.0M———County
18 Aug 2011Flash Flood—$30K———County
7 Jul 2011Flash Flood————1County
30 Jul 2010Flash Flood—$20K—1—County
30 Jul 2010Flash Flood—$500K———County
30 Jun 2009Flash Flood—$50K———County
3 Aug 2008Flash Flood———3—County
19 Jul 2008Flash Flood———1—County
27 Jan 2008Flood—$777K———County
4 Aug 2007Flash Flood———2—County
31 Jul 2007Flash Flood———1—County
31 Jul 2007Flash Flood—$100K———County
28 Jul 2007Flash Flood—$100K———County
7 Sep 2006Flash Flood—$80K—1—County
8 Aug 2006Flash Flood—$75K———County
31 Jul 2006Flood—$3.0M———County
31 Jul 2006Flash Flood—$750K———County
29 Jul 2006Flash Flood—$40K———County
23 Aug 2005Flash Flood—$100K———County
14 Aug 2005Flash Flood—$10K—1—County
2 Aug 2005Flash Flood—$5K—1—County
27 Jul 2005Flash Flood—$40K———County
24 Aug 2003Flash Flood—$30K———County
29 Jul 2003Flash Flood—$50K———County
13 Aug 2001Flash Flood—$40K———County
31 Jul 2001Flash Flood—$15K—1—County
16 Jul 2001Flash Flood—$25K———County
5 Jul 2001Flash Flood—$90K———County
29 Aug 2000Flash Flood—$50K———County
26 Jul 1999Flash Flood—$40K———County
15 Jul 1999Flash Flood—$10M———County
9 Aug 1998Flash Flood———1—County
25 Sep 1996Flash Flood—$100K———County
3 Sep 1996Flash Flood—$500K——2County
27 Aug 1996Flash Flood—$50K———County
9 Aug 1996Flash Flood—$50K———County

Questions and answers

How many flood events has Pima County had?

568 events in the NCEI Storm Events record between 1950 and 2026. Reporting of floods and flash floods became far more complete after 1996, so early decades undercount.

When was the last recorded flood event in Pima County?

17 Jun 2026 (Flash Flood). Records reach NCEI about 120 days after the month ends.

What was the most damaging flood event recorded in Pima County?

The flash flood of 15 Jul 1999, with property damage estimated by NCEI at $10M.

How does Pima County compare with Arizona for flood?

6.2 events per 100 square miles against 3.4 statewide; the county holds 568 of the state's 3,896 recorded events.

Provenance

NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 1 Oct 2026. See the methodology, the Flood hub and the county page.