Drought risk in Washington

Drought in Washington: Characteristics and Geography

Washington's climate is sharply divided by the Cascade Range. The western side of the state is known for its wet, mild climate, while the eastern side is much drier, receiving far less precipitation. Drought in Washington is not simply a matter of low rainfall; it is closely tied to mountain snowpack. The snow that accumulates in the Cascades and Olympic Mountains during winter acts as a natural reservoir, slowly releasing water during spring and summer. When snowpack is below normal, water supplies for drinking, irrigation, hydropower, and fish habitat can become strained, even if rainfall is near average.

Drought can develop in any season, but its impacts are most acutely felt in summer and early fall when demand for water is highest. The most drought-prone regions include the Columbia Basin, the Yakima Valley, the Okanogan, and the Spokane area. Communities that rely on shallow wells, small water systems, or snowmelt-fed streams are particularly vulnerable. While the Puget Sound region is generally wetter, it can still experience drought effects, especially during prolonged dry spells or when regional water supplies are low. The National Integrated Drought Information System (Drought.gov) and the U.S. Drought Monitor provide current drought conditions and outlooks for Washington.

Washington has a formal drought response process. Under state law, a drought emergency can be declared when water supply conditions are below 75% of normal and are likely to cause undue hardship. The Washington Emergency Management Division (WEMD) coordinates state resources and supports local jurisdictions during drought emergencies. Drought is a slow-onset hazard, often building over months, so early monitoring and conservation are key.

How it affects homes

Drought can affect homes in several ways, some direct and some indirect. The most immediate impact is on water supply. Private wells may run dry or experience reduced yield as groundwater levels drop. This can leave homeowners without water for drinking, sanitation, and landscaping. Even if a well doesn't go dry, water quality can deteriorate as contaminants become more concentrated.

Another common issue is foundation damage. During drought, clay-rich soils shrink, which can cause foundations to settle unevenly, leading to cracks in walls, sticking doors, and other structural problems. This is especially prevalent in areas with expansive soils, such as parts of eastern Washington. Drought also stresses landscaping, lawns, and trees, increasing irrigation needs and sometimes leading to permanent plant loss.

Drought amplifies wildfire risk. Dry vegetation becomes highly flammable, and a single spark can ignite a fast-moving fire that threatens homes. Wildfire insurance is a critical consideration for homeowners in drought-prone areas. Standard homeowners insurance typically does not cover drought-related damage such as wells going dry or gradual foundation settling. However, if a wildfire damages your home, your fire coverage may apply. Some insurers offer endorsements for water backup or service line coverage, which can help with certain water-related losses. It's wise to review your policy and discuss options with your agent.

How to prepare your home

Preparing for drought involves reducing water use, protecting your property, and having a plan. Here are concrete steps:

• Conserve water indoors: Fix leaks promptly, install EPA WaterSense-labeled fixtures and appliances, and take shorter showers.
• Landscape wisely: Choose drought-tolerant plants, group them by water needs, and use mulch to retain soil moisture. Water deeply but less frequently to encourage deep roots.
• Harvest rainwater: Where allowed by local codes, install rain barrels or cisterns to capture roof runoff for outdoor use.
• Maintain your well: Periodically check water levels and pump performance. If your well is susceptible to drought, consider deepening it or connecting to a community water system if feasible.
• Create defensible space: Clear dry vegetation, dead leaves, and debris from around your home to reduce wildfire risk during drought.
• Store emergency water: Keep at least one gallon per person per day for a minimum of three days, ideally two weeks, for drinking and sanitation.
• Review insurance coverage: Understand what your policy covers and what it doesn't. Consider adding endorsements for water backup or service lines if available.
• Stay informed: Monitor drought conditions via the U.S. Drought Monitor and Drought.gov, and follow local water restrictions.

Frequently asked questions

Does Washington state experience droughts?

Yes. While Washington is often associated with rain, drought is a recurring natural hazard, particularly in eastern Washington and in years with low snowpack. Drought emergencies have been declared in the past, and climate variability means any part of the state can be affected.

How can drought damage my home's foundation?

During drought, clay soils shrink as they lose moisture. This can cause the ground to pull away from foundations, leading to uneven settling, cracks in walls or floors, and misaligned doors and windows. These problems can be expensive to repair and are typically not covered by standard homeowners insurance.

Is drought damage covered by homeowners insurance?

Generally, no. Standard homeowners insurance policies exclude damage from drought, including wells going dry and gradual foundation movement. However, some related losses, such as fire damage from a drought-fueled wildfire, may be covered. Check with your insurer about specific coverages and endorsements.

Official resources

• Washington Emergency Management Division – state agency coordinating drought response and preparedness.
• U.S. Drought Monitor – weekly maps and data on drought conditions across the U.S.
• Drought.gov – the National Integrated Drought Information System, with state-specific drought information.
• EPA WaterSense – tips and products for water efficiency and conservation.