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Flood in Riverside County, California

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

428 events · 6 deaths recorded · peak month August · county share of state 6.0%

2025-12-25: Flood2025-11-15: Flood2025-11-15: Flood2025-11-15: Flood2025-11-15: Flood2025-09-18: Flood2025-09-18: Flood2025-09-17: Flood2025-08-25: Flood2025-08-25: Flood2025-03-13: Flood2025-02-13: Flood2025-02-13: Flood2025-02-13: Flood2025-02-13: Flood2025-02-13: Flood2025-02-13: Flood2025-02-13: Flood2025-02-13: Flood2024-09-08: Flood2024-07-14: Flood2024-03-15: Flood2024-03-07: Flood2024-03-07: Flood2024-02-05: Flood2024-02-05: Flood2024-02-05: Flood2024-02-05: Flood2024-01-22: Flood2024-01-22: Flood2024-01-22: Flood2023-12-22: Flood2023-11-15: Flood2023-09-01: Flood2023-09-01: Flood2023-09-01: Flood2023-09-01: Flood2023-09-01: Flood2023-09-01: Flood2023-09-01: Flood2023-09-01: Flood2023-08-20: Flood2023-08-20: Flood2023-08-20: Flood2023-08-20: Flood2023-08-20: Flood2023-08-20: Flood2023-08-20: Flood2023-08-20: Flood2023-08-20: Flood2023-08-20: Flood2023-08-20: Flood2023-08-20: Flood2023-08-18: Flood2023-03-21: Flood2023-03-21: Flood2023-03-21: Flood2023-03-21: Flood2023-03-21: Flood2023-03-15: Flood2023-03-15: Flood2023-03-15: Flood2023-03-15: Flood2023-03-15: Flood2023-03-01: Flood2023-03-01: Flood2023-03-01: Flood2023-01-15: Flood2023-01-14: Flood2023-01-10: Flood2023-01-10: Flood2023-01-05: Flood2023-01-01: Flood2022-12-11: Flood2022-11-08: Flood2022-11-08: Flood2022-11-08: Flood2022-10-15: Flood2022-10-15: Flood2022-10-15: Flood2022-10-15: Flood2022-10-15: Flood2022-10-12: Flood2022-10-01: Flood2022-09-28: Flood2022-09-12: Flood2022-09-12: Flood2022-09-12: Flood2022-09-12: Flood2022-09-10: Flood2022-08-24: Flood2022-08-24: Flood2022-08-24: Flood2022-08-24: Flood2022-08-24: Flood2022-08-20: Flood2022-08-18: Flood2022-08-16: Flood2022-08-13: Flood2022-08-08: Flood2022-08-08: Flood2022-08-08: Flood2022-08-08: Flood2022-08-01: Flood2022-06-22: Flood2022-06-22: Flood2021-12-24: Flood2021-12-24: Flood2021-12-24: Flood2021-12-24: Flood2021-12-23: Flood2021-12-14: Flood2021-12-14: Flood2021-09-17: Flood2021-09-09: Flood2021-08-30: Flood2021-07-30: Flood2021-07-30: Flood2021-07-28: Flood2021-07-26: Flood2021-01-29: Flood2019-12-04: Flood2019-11-28: Flood2019-11-28: Flood2019-09-01: Flood2019-02-14: Flood2019-02-14: Flood2019-02-14: Flood2019-02-14: Flood2019-02-14: Flood2019-02-14: Flood2019-02-14: Flood2019-01-16: Flood2018-10-12: Flood2018-09-30: Flood2018-09-30: Flood2017-09-09: Flood2017-09-09: Flood2017-09-09: Flood2017-09-09: Flood2017-08-03: Flood2017-01-23: Flood2017-01-22: Flood2017-01-20: Flood2015-07-19: Flood2015-07-19: Flood2015-07-19: Flood2014-08-03: Flood2013-11-21: Flood2013-09-05: Flood2013-09-03: Flood2013-08-29: Flood2013-08-25: Flood2013-08-25: Flood2012-10-11: Flood2012-09-11: Flood2012-09-11: Flood2012-08-30: Flood2012-08-30: Flood2011-09-13: Flood2011-09-13: Flood2010-12-22: Flood2010-01-21: Flood2010-01-21: Flood2009-12-13: Flood2008-07-20: Flood2008-05-22: Flood2005-10-17: Flood2005-07-30: Flood2005-07-23: Flood2005-02-21: Flood2005-01-10: Flood2005-01-09: Flood2005-01-09: Flood2005-01-09: Flood2005-01-09: Flood
Flood event locations in and around Riverside 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.

NCEI records 428 flood events in Riverside County, California, between 1950 and 2026, spread over 29 years.

August is the busiest month, with 90 of the recorded events. The last 20 years account for 321 events against 107 in the 20 years before, a change that reflects reporting practice as much as weather.

The county holds 6% of the 7,136 flood events recorded in California; its 5.9 per 100 square miles compares with 4.6 statewide.

NCEI attributes 6 deaths in the county to floods and flash floods.

Compared with California

MeasureRiverside CountyCaliforniaUS
Flood events since 19504287,136183,559
Per 100 square miles5.94.65.2
Per 10,000 residents1.71.85.5
Deaths recorded61212,961
Busiest monthAugustJanuaryJune

By year

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

Seasonality

Jan
44Feb
41Mar
27Apr
7May
2Jun
2Jul
62Aug
90Sep
79Oct
26Nov
21Dec
27
Flood events in Riverside County by month of occurrence, all years.

Recorded events

The 199 events kept for this page are the 120 most recent plus the 80 with the most damage, deaths or injuries out of 428. Magnitude is hail size, tornado rating or wind speed as recorded.

DateEvent typeMagnitudeProperty damageCrop damageDeathsInjuriesGeography
25 Dec 2025Flood—————County
15 Nov 2025Flood—————County
15 Nov 2025Flood—————County
15 Nov 2025Flood—————County
15 Nov 2025Flood—————County
18 Sep 2025Flash Flood—$20K———County
18 Sep 2025Flash Flood—————County
17 Sep 2025Flash Flood—————County
25 Aug 2025Flood—————County
25 Aug 2025Flood—————County
13 Mar 2025Flash Flood—————County
13 Feb 2025Flood—————County
13 Feb 2025Flood—————County
13 Feb 2025Flood—————County
13 Feb 2025Flood—————County
13 Feb 2025Flood—————County
13 Feb 2025Flood—————County
13 Feb 2025Flood—————County
13 Feb 2025Flood—————County
8 Sep 2024Flood—$10K———County
14 Jul 2024Flash Flood—$20K———County
15 Mar 2024Flood—————County
7 Mar 2024Flood—————County
7 Mar 2024Flood—————County
5 Feb 2024Flood—————County
5 Feb 2024Flood—————County
5 Feb 2024Flood—————County
5 Feb 2024Flood—————County
22 Jan 2024Flood—————County
22 Jan 2024Flood—————County
22 Jan 2024Flood—————County
22 Dec 2023Flash Flood—————County
15 Nov 2023Flood—————County
1 Sep 2023Flash Flood—————County
1 Sep 2023Flash Flood—————County
1 Sep 2023Flash Flood—————County
1 Sep 2023Flash Flood—————County
1 Sep 2023Flash Flood—————County
1 Sep 2023Flash Flood—$20K———County
1 Sep 2023Flash Flood—$20K———County
1 Sep 2023Flash Flood—————County
20 Aug 2023Flash Flood—————County
20 Aug 2023Flash Flood—————County
20 Aug 2023Flash Flood—————County
20 Aug 2023Flood—————County
20 Aug 2023Flood—————County
20 Aug 2023Flood—————County
20 Aug 2023Flood—————County
20 Aug 2023Flood—————County
20 Aug 2023Flash Flood—————County
20 Aug 2023Flood—————County
20 Aug 2023Flash Flood—————County
20 Aug 2023Flash Flood—————County
18 Aug 2023Flash Flood—————County
21 Mar 2023Flood—————County
21 Mar 2023Flood—————County
21 Mar 2023Flood—————County
21 Mar 2023Flash Flood—————County
21 Mar 2023Flood—————County
15 Mar 2023Flood—————County
15 Mar 2023Flood—————County
15 Mar 2023Flash Flood—$10K———County
15 Mar 2023Flood—————County
15 Mar 2023Flash Flood—————County
1 Mar 2023Flood—————County
1 Mar 2023Flood—————County
1 Mar 2023Flood—————County
15 Jan 2023Flood—————County
14 Jan 2023Flood—————County
10 Jan 2023Flood—————County
10 Jan 2023Flood—————County
5 Jan 2023Flash Flood—————County
1 Jan 2023Flash Flood—————County
11 Dec 2022Flash Flood—————County
8 Nov 2022Flood—————County
8 Nov 2022Flood—————County
8 Nov 2022Flash Flood—————County
15 Oct 2022Flood—————County
15 Oct 2022Flash Flood—————County
15 Oct 2022Flash Flood—————County
15 Oct 2022Flash Flood—————County
15 Oct 2022Flash Flood—$1K———County
12 Oct 2022Flash Flood—————County
1 Oct 2022Flash Flood—————County
28 Sep 2022Flood—————County
12 Sep 2022Flash Flood—————County
12 Sep 2022Flash Flood—————County
12 Sep 2022Flood—————County
12 Sep 2022Flood—————County
10 Sep 2022Flood—————County
24 Aug 2022Flood—————County
24 Aug 2022Flood—————County
24 Aug 2022Flash Flood—————County
24 Aug 2022Flash Flood—————County
24 Aug 2022Flash Flood—$100K———County
20 Aug 2022Flash Flood—————County
18 Aug 2022Flash Flood—$15K———County
16 Aug 2022Flash Flood—————County
13 Aug 2022Flash Flood—————County
8 Aug 2022Flash Flood—————County
8 Aug 2022Flash Flood—————County
8 Aug 2022Flash Flood—————County
8 Aug 2022Flash Flood—————County
1 Aug 2022Flash Flood—————County
22 Jun 2022Flash Flood—————County
22 Jun 2022Flash Flood—$5K———County
24 Dec 2021Flood—————County
24 Dec 2021Flood—————County
24 Dec 2021Flood—————County
24 Dec 2021Flood—————County
23 Dec 2021Flood—$2K———County
14 Dec 2021Flash Flood—$5K———County
14 Dec 2021Flash Flood—————County
17 Sep 2021Flash Flood—————County
9 Sep 2021Flood—————County
30 Aug 2021Flash Flood—————County
30 Jul 2021Flash Flood—$10K———County
30 Jul 2021Flash Flood—————County
28 Jul 2021Flash Flood—————County
26 Jul 2021Flood—$1K$1K——County
29 Jan 2021Flood—$1.0M———County
4 Dec 2019Flash Flood—$759K———County
28 Nov 2019Flash Flood—$760K———County
28 Nov 2019Flash Flood—$30K———County
1 Sep 2019Flash Flood—$75K———County
14 Feb 2019Flash Flood—$70M———County
14 Feb 2019Flash Flood—$20K——4County
14 Feb 2019Flash Flood—$15M———County
14 Feb 2019Flash Flood—$10M———County
14 Feb 2019Flash Flood—$3.0M———County
14 Feb 2019Flash Flood—$3.0M———County
14 Feb 2019Flash Flood—$1.0M———County
16 Jan 2019Flash Flood—$20K$10K——County
12 Oct 2018Flash Flood—$100K———County
30 Sep 2018Flash Flood—$50K—1—County
30 Sep 2018Flash Flood—$200K——1County
9 Sep 2017Flash Flood—$1.0M———County
9 Sep 2017Flash Flood—$400K———County
9 Sep 2017Flash Flood—$100K———County
9 Sep 2017Flash Flood—$75K———County
3 Aug 2017Flash Flood—$125K———County
23 Jan 2017Flash Flood—$40K———County
22 Jan 2017Flash Flood————1County
20 Jan 2017Flood————10County
19 Jul 2015Flash Flood—$50M——1County
19 Jul 2015Flash Flood—$100K———County
19 Jul 2015Flash Flood—$30K———County
3 Aug 2014Flash Flood—$50K———County
21 Nov 2013Flash Flood————1County
5 Sep 2013Flash Flood—$500K———County
3 Sep 2013Flash Flood—$100K———County
29 Aug 2013Flash Flood—$500K———County
25 Aug 2013Flash Flood—$200K———County
25 Aug 2013Flash Flood—$120K———County
11 Oct 2012Flood—$60K———County
11 Sep 2012Flash Flood—$2.0M———County
11 Sep 2012Flash Flood—$150K———County
30 Aug 2012Flash Flood—$150K———County
30 Aug 2012Flash Flood—$100K———County
13 Sep 2011Flash Flood—$150K———County
13 Sep 2011Flash Flood—$75K———County
22 Dec 2010Flash Flood———1—County
21 Jan 2010Flood—$150K———County
21 Jan 2010Flash Flood—$100K———County
13 Dec 2009Flash Flood—$100K———County
20 Jul 2008Flash Flood—$500K——1County
22 May 2008Flash Flood—$500K———County
6 Sep 2006Flash Flood—$25K———County
4 Sep 2006Flash Flood—$100K———County
2 Sep 2006Flash Flood—$35K———County
17 Oct 2005Flash Flood—$200K———County
30 Jul 2005Flash Flood—$30K———County
23 Jul 2005Flash Flood—$50K———County
21 Feb 2005Flash Flood—$150K———County
10 Jan 2005Flash Flood—$50K———County
9 Jan 2005Flash Flood—$5.0M———County
9 Jan 2005Flash Flood—$150K———County
9 Jan 2005Flash Flood—$50K———County
9 Jan 2005Flash Flood—$40K———County
20 Oct 2004Flash Flood—$500K———County
18 Feb 2004Flash Flood—$25K———County
12 Nov 2003Flash Flood—$60K———County
4 Sep 2003Flash Flood—$100K———County
4 Sep 2003Flash Flood—$30K———County
20 Aug 2003Flash Flood—$500K———County
13 Feb 2003Flood—$100K———County
9 Jan 2003Flood—$40K———County
16 Dec 2002Flood—$150K———County
6 Jul 2001Flash Flood—$1.2M———County
13 Feb 2001Flood—$60K——1County
30 Oct 2000Flood—$25K———County
29 Aug 2000Flash Flood—$40K———County
8 Mar 2000Flood—$60K—24County
5 Mar 2000Flash Flood—$300K—1—County
13 Jul 1999Flash Flood————3County
12 Jul 1999Flood—$50K—14County
12 Jul 1999Flood—$500K———County
11 Jul 1999Flash Flood—$500K———County
23 Feb 1998Flash Flood—$8.2M$4.2M——County

Questions and answers

How many flood events has Riverside County had?

428 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 Riverside County?

25 Dec 2025 (Flood). Records reach NCEI about 120 days after the month ends.

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

The flash flood of 14 Feb 2019, with property damage estimated by NCEI at $70M.

How does Riverside County compare with California for flood?

5.9 events per 100 square miles against 4.6 statewide; the county holds 428 of the state's 7,136 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.