Pineapple Express. Atmospheric river. Pacific moisture plume. Whatever you call it, it dumps 4-8 inches of rain on Portland in 24-48 hours, overwhelms storm drains, saturates ground around foundations, and floods basements and crawl spaces across the metro. Same-hour Portland dispatch.
Here's what to do — and what not to do — in the next 5 minutes. The window between the loss starting and significant structural damage is short.
Atmospheric river flooding in Portland traces to specific PNW topographic and meteorological patterns that have produced repeat catastrophic events over decades.
Atmospheric rivers — also called Pineapple Express events when sourced from Hawaii — are narrow corridors of intense Pacific moisture. When one stalls over the western Cascades, Portland receives 4-8 inches of rain in 24-48 hours. November 2006 and December 2007 produced reference Pineapple Express events. January 2022 and January 2024 events demonstrate this pattern continues.
Multi-day atmospheric river events upstream cause Willamette River stage to rise dramatically in Portland. The February 1996 floods produced record stages along the Willamette in Portland and damaged thousands of homes from Sellwood to downtown. The 1948 Vanport flood remains historic context. Modern flood control has reduced but not eliminated this risk.
Johnson Creek through Lents and Brentwood-Darlington, Fanno Creek through Tigard and southwest Portland, Tryon Creek through Lake Oswego, Crystal Springs through Eastmoreland — all flood during heavy atmospheric river rainfall. Damage extends well beyond FEMA-mapped Special Flood Hazard Areas.
Inner Portland's combined sewer system, designed for normal precipitation, overwhelms during atmospheric river events. Combined sewer overflows backup into basements through floor drains and toilets. This is THE most common Portland flood scenario.
After 48-72 hours of saturated soil, groundwater table rises around foundation walls. Foundation seals fail, water enters basements through walls and floor joints. This pattern persists for days after rainfall stops.
Our IICRC-certified Portland crew arrives with truck-mounted extraction units, structural drying equipment for PNW humidity conditions, full PPE rated for Category 3 flood water if needed, moisture meters, contents pack-out supplies. In the first 60 minutes: containment perimeter established, water extraction begins, photographic documentation of every affected room, contents triage.
Over the next 24-48 hours: continued extraction, demolition of all unsalvageable porous materials (drywall below the water line, carpet, insulation, baseboards, basement framing exposure if affected), pressure-wash and decontaminate hard surfaces, EPA-registered antimicrobial treatment, structural drying with LGR dehumidifiers, NFIP/flood claim coordination, contents assessment.
We bill your insurance carrier directly so your out-of-pocket cost is typically just your deductible. We work with every major Oregon carrier including PEMCO and Country Financial — and high-net-worth specialty carriers for custom-home losses.
Same-hour dispatch to all of these Portland-area cities. Our crews are local — we know the neighborhoods, the watersheds, the construction patterns, and the carriers.
Standard homeowners excludes flood damage. Coverage requires a separate NFIP (National Flood Insurance Program) policy or private flood insurance. Many Portland homeowners outside FEMA-mapped Special Flood Hazard Areas don't carry NFIP — even though atmospheric river events repeatedly flood homes well outside the mapped flood zones.
Critical legal distinction. Water damage = water from inside the home (burst pipe, roof leak, sewer backup, appliance failure) — covered by standard homeowners. Flood damage = surface water that entered from outside, including atmospheric river runoff, creek overflow, and groundwater. Excluded from homeowners; requires separate flood policy.
Combined sewer backup during atmospheric river events is covered by Sewer/Water Backup riders (typically $40-$100/year, $5,000-$25,000 coverage). Many Portland homeowners don't realize they need this rider until they file the claim. We help document the loss for whichever coverage applies.
Same-hour dispatch begins as soon as it's safe to access the property. Demand exceeds Portland metro restoration capacity during major events for 3-6 weeks; we prioritize active emergency dispatches.
Single-story home or basement-only damage: 2-4 weeks mitigation plus 6-12 weeks reconstruction. Multi-story damage: 4-8 weeks mitigation plus 4-12 months reconstruction. Major events like the 1996 floods produced losses that took 6-12 months to fully restore.
Same-hour IICRC-certified crew dispatch. Direct insurance billing. Free on-site assessment.