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How often floodwater reaches Pasadena homes

Local figures and plain answers for Pasadena, CA, written for people dealing with water damage now.

Expected inland flood losses in Pasadena's ZIP codes run about $141 a year per $100,000 of building value, against $164 across Los Angeles County.

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  • Water removal, drying and repair

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Technical drawing of flood damage restoration: flooded basement cleanup, storm water cleanup and crawl space water removal.
Flood Damage Restoration covers flooded basement cleanup, storm water cleanup and crawl space water removal.

Your call, step by step

  1. Call (833) 728-2327

    Tell the person who answers what got wet and where the water came from. Calls are answered 24/7.

  2. Stop the source

    You get help shutting off the water or the power to a wet room while the crew is on the way.

  3. Inspection and written estimate

    Moisture readings, photos and a written estimate come before any work begins.

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A guide for water damage restoration in Pasadena and the towns around it.

37% of homes in Pasadena are from before 1950, against 24% across Los Angeles County.

Pasadena and water from outside

Floodwater reaches Pasadena homes rarely, but the city gets more heavy rain than the rest of Los Angeles County. NOAA climate normals show 7 days a year with an inch of rain or more here, against 4 for the county and 4 for the state. FEMA flood insurance records show 0.2 claims per 1,000 homes across Los Angeles County from 2016 to 2025, below California's 0.5.

FEMA's National Risk Index estimates Pasadena's yearly inland flood loss at $141 per $100,000 of building value, a little under the county's 164 and the state's 149. Only 0.5% of county homes carry federal flood insurance, and the average building payment on a county claim was $38,214. Los Angeles County has 8 major disaster declarations for floods and storms since 2000, and storm reports note flash flooding or flooding on 29 days between 2016 and 2025. So heavy rain comes often, and few households hold a policy for it.

Water from outside is Category 3. It carries soil, street runoff and sewage, so soaked carpet pad and drywall are usually removed. Homeowners policies usually exclude that water, so only a flood policy would cover it. With 58% of homes rented, tenants should know that a landlord's policy usually covers the building and not their belongings. Anywhere in the Pasadena area, the restoration crew pumps and tests storm water before drying, the same order used for sewage cleanup.

Flood and weather figures for Pasadena

Figures for Pasadena, home to about 136,462 people.

44% of homes in Pasadena sit in larger multi-unit buildings, compared with 24% across California.

58% of homes in Pasadena are rented.

12% of households in Pasadena moved in from 2021 on, compared with 9% across California.

  • 141 Yearly inland flood loss per $100,000 of building valueLos Angeles County: 164 Pasadena141Los Angeles164CA149
  • 62,853 Housing units
  • 136,462 Residents
  • 37% Homes built before 1950Los Angeles County: 24% Pasadena37%Los Angeles24%CA14%
  • 44% Homes in buildings with 5 or more unitsLos Angeles County: 36% Pasadena44%Los Angeles36%CA24%
  • 58% Homes that are rentedLos Angeles County: 54% Pasadena58%Los Angeles54%CA44%
  • 7 Days a year with an inch of rain or moreLos Angeles County: 4 Pasadena7Los Angeles4CA4
  • 73% Homes built before 1980Los Angeles County: 71% Pasadena73%Los Angeles71%CA57%
  • 0% Mobile and manufactured homesLos Angeles County: 2% Pasadena0%Los Angeles2%CA4%

Sources: U.S. Census Bureau, American Community Survey 2019-2023 5-year estimates; FEMA OpenFEMA, FIMA NFIP Redacted Claims v3, claims from 2016 to 2025 (not endorsed by FEMA); FEMA OpenFEMA, NFIP Residential Penetration Rates v1 (not endorsed by FEMA); FEMA National Risk Index v1.20, December 2025 (not endorsed by FEMA); NOAA NCEI, U.S. Climate Normals 1991-2020, nearest weather station; FEMA OpenFEMA, Disaster Declarations Summaries v2 (not endorsed by FEMA); NOAA NCEI Storm Events Database, 2016 to 2025.

Getting ready in Pasadena

Pasadena's 7 days a year with an inch of rain or more put more water on its roofs and yards than the county sees, and the housing is old. Census figures show 73% of homes here were built before 1980 and 37% before 1950. On older lots, settled soil and short downspouts often send roof water straight to the foundation. Before the next storm, clear out each downspout and extend it well clear of the house, and fill low spots so the ground slopes away from the walls.

If you have a basement or a sump pit, pour a bucket of water in to test the pump and add a battery backup for outages. Clear leaves out of window wells and fit covers. Lift papers, photos and electronics off lower floors. With 58% of homes rented and 44% in buildings with 5 or more units, tenants should ask who maintains shared drains and should carry renters insurance for their own things. Check your address on the FEMA flood map. FEMA notes that a new flood policy has a 30-day waiting period before it takes effect, so do not wait for the forecast.

If water gets in, switch off power to wet rooms, take photos and call for water removal. Outside water is Category 3, so the restoration crew pulls out soaked pad and wet drywall before drying. Water removal from carpet alone is not enough after a storm, because the pad holds contaminated water. The same steps apply in the Pasadena area as in the rest of Los Angeles County.

What to have on hand before storm season

Get ready in Pasadena before the water does. Check your address on FEMA's flood maps, record a short video of every room, and keep policy numbers and the location of the main shutoff and breaker panel on paper. Store important papers above the basement floor. When water comes in, take photos of the water line before anything is moved; those pictures matter for the cleanup plan and for any claim. Laminate and hardwood under floodwater often need subfloor water damage repair once drying ends.

What Pasadena callers ask about floods

What does a FEMA flood risk rating mean for my Pasadena home?

FEMA's National Risk Index rates counties and census tracts for hazards such as riverine and coastal flooding, from very low to very high, using expected losses and community factors. It describes the area, not one house: a low lot or a basement can flood in a lower-rated area. Check your own FEMA flood zone too.

How do I keep storm water out of a Pasadena basement?

Most basement water from storms comes from runoff at the foundation. Point downspouts away from the house, keep the yard sloping away, test the sump pump and its backup, and seal cracks and window wells.

Is flood cleanup different from other water damage?

Yes. Outside floodwater is Category 3 under the IICRC S500 standard, so carpet, pad, insulation and drywall below the water line are removed rather than dried, and hard surfaces are disinfected. Sewage and chemicals in floodwater are why the crew wears protective gear.

What should I do after floodwater gets into my Pasadena home?

Keep out of the water until the electricity to the area is off. Floodwater counts as contaminated, so wear boots and gloves if you must go in. Photograph the water line, then call for extraction and drying; soaked porous materials below the line are usually removed.

Where can I check the flood zone for a Pasadena address?

On the FEMA Flood Map Service Center at msc.fema.gov: type the address to see its flood zone and the map's date. FEMA's National Risk Index adds a county and ZIP view of expected flood losses. A low-risk zone is not a no-risk zone; water from heavy rain still reaches basements outside mapped flood areas.

Other guides for Pasadena

Pasadena guides on costs, first steps and floods

Call (833) 728-2327

Calls answered 24/7. The estimate is in writing before work begins.

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