Drought risk in Oregon

Drought in Oregon: Geography, Seasons, and Exposure

Oregon’s climate is defined by wet winters and dry summers, with dramatic variations across the state. The Cascade Range splits Oregon into two distinct climate zones: the wetter western side and the arid eastern side. Much of Oregon’s water supply depends on mountain snowpack, which acts as a natural reservoir, slowly releasing water during spring and summer. When winter snowpack is below average, drought conditions can develop even if rainfall totals are near normal.

Drought in Oregon is most severe and persistent in the eastern and southern parts of the state. The high desert of eastern Oregon—including Harney, Malheur, and Klamath counties—receives little annual precipitation and is frequently in drought. The Klamath Basin has experienced severe multi-year droughts. Central Oregon (Deschutes, Crook, and Jefferson counties) and the Rogue Valley in the south are also highly vulnerable. The Willamette Valley, while generally wetter, can experience drought during dry summers, impacting agriculture and urban water supplies. Coastal areas are less prone but not immune to dry spells.

Drought can occur in any season, but it typically intensifies during summer and fall when temperatures rise and precipitation is minimal. Multi-year droughts are possible, as seen in recent decades. The US Drought Monitor provides weekly maps and assessments, while Drought.gov offers state-specific data and outlooks.

How Drought Affects Homes

Drought does not directly damage homes like floods or hurricanes, but its secondary effects can be costly and disruptive. One of the most immediate impacts is on water supply. Homes served by private wells may find their wells running dry or producing less water as aquifers drop. In areas with municipal water, drought can lead to mandatory water restrictions, limiting outdoor watering and increasing water bills.

Foundation problems are common in drought-prone areas. When clay-rich soils dry out, they shrink, and when they rewet, they expand. This cycle can cause foundations to crack, walls to bow, and doors and windows to stick. Landscaping—lawns, trees, and shrubs—can die, which not only affects curb appeal but also increases wildfire risk. Dead vegetation becomes fuel for wildfires, which can destroy homes. Drought is a key contributor to Oregon’s increasingly severe wildfire seasons.

From an insurance perspective, standard homeowners policies typically do not cover drought-related damage. Foundation cracking from soil movement is often excluded as “earth movement,” and well failure is usually not covered. However, fire damage from a drought-fueled wildfire is generally covered under standard policies. If you live in a wildfire-prone area, you may need additional coverage or a specialized policy. It’s important to review your policy with your agent and document your home’s condition before drought conditions worsen.

How to Prepare Your Home for Drought

Taking proactive steps can reduce your home’s vulnerability to drought and its side effects. The following measures are recommended by emergency managers and water conservation experts:

• Conserve water indoors and outdoors. Install EPA WaterSense labeled fixtures, fix leaks promptly, run full loads in dishwashers and washing machines, and take shorter showers. Outdoors, water early in the morning or late in the evening to reduce evaporation.
• Switch to drought-tolerant landscaping. Replace thirsty lawns with native or drought-resistant plants, use mulch to retain soil moisture, and group plants by water needs. Consider xeriscaping principles.
• Harvest rainwater. Use rain barrels or cisterns to capture roof runoff for outdoor watering. Check local regulations, as some areas restrict rainwater harvesting.
• Maintain your well. If you rely on a private well, have it inspected regularly, monitor water levels, and consider deepening the well or installing a storage tank if you are in a drought-prone area.
• Protect your foundation. Maintain consistent soil moisture around your foundation by using soaker hoses during dry periods. Avoid over-watering, which can cause soil expansion. Consult a foundation specialist if you notice cracks.
• Create defensible space. Reduce flammable vegetation within at least 30 feet of your home, clear dead leaves and branches, and use fire-resistant landscaping. This is critical in wildland-urban interface areas.
• Store emergency water. Keep a supply of at least one gallon per person per day for drinking and sanitation, plus extra for pets. Store in a cool, dark place and rotate every six months.
• Stay informed. Monitor the US Drought Monitor and local water restrictions. Sign up for alerts from the Oregon Department of Emergency Management.
• Review your insurance. Understand what is covered and what is excluded. Ask about wildfire coverage and consider additional endorsements if needed.

Frequently Asked Questions

Is drought covered by homeowners insurance in Oregon?

No, drought itself is not covered by standard homeowners insurance. Damage from drought, such as foundation cracking due to soil shrinkage, is often excluded as “earth movement.” However, fire damage from a wildfire—which drought can exacerbate—is typically covered. Review your policy carefully and discuss coverage options with your insurance agent.

How can I conserve water during an Oregon drought?

Use EPA WaterSense labeled fixtures, fix leaks, and adopt water-saving habits like shorter showers and full loads of laundry. Outdoors, water lawns less frequently, use drip irrigation, and plant drought-tolerant species. Follow any local water restrictions issued by your utility.

Which parts of Oregon are most vulnerable to drought?

Eastern and southern Oregon are generally the most vulnerable, including the high desert, Klamath Basin, and Rogue Valley. Central Oregon and parts of the Willamette Valley can also experience significant drought, especially when snowpack is low. The US Drought Monitor provides current conditions for all regions.

Official Resources

• Oregon Department of Emergency Management
• US Drought Monitor
• Drought.gov
• EPA WaterSense