Small temperature changes. Big water impacts.

 

If it still rains, shouldn't there still be enough water? It seems like a simple question. But the answer depends on what happens after the water reaches the ground.

Climate change isn't just about how much precipitation falls. It's also about rising temperatures—and heat changes how water moves through the landscape.

For NID, a warmer future could mean less water reaching streams and reservoirs, even in years when precipitation remains similar.

Because water doesn't just fall from the sky. It has a journey.

Heat Changes the Water Cycle

Every drop of rain and every snowflake moves through a complex journey.

Some water flows into streams and reservoirs. Some is stored in snowpack, forests, and soils. Some is used by plants. Some returns to the atmosphere.

As temperatures rise, that balance changes.

More water can be lost before it reaches the reservoirs that supply our communities.

A Thirstier Landscape

Warmer temperatures dry soils faster, increase evaporation, and cause plants to use more water through a natural process called evapotranspiration.

When soils are dry, more rainfall and snowmelt can be absorbed before reaching streams.

The result?

The same amount of precipitation can produce less available water when temperatures are warmer.

Why This Matters

Climate change does not have to dramatically reduce rainfall to affect water supplies. Warmer conditions can mean more water is: absorbed by dry soils, used by vegetation, lost through evaporation, or released from the watershed earlier in the year.

Climate models used in NID planning indicate that rising temperatures could reduce future inflows to reservoirs, not simply because less precipitation falls, but because the landscape itself is changing.

Planning for a Warmer Future

Understanding the impacts of rising temperatures is one reason NID developed its Plan for Water, a long-range effort to evaluate how future conditions could affect water supplies over the next 50 years.

The goal isn't to predict one exact future. It's to make decisions today that remain effective across many possible futures.

By combining climate science, water modeling, and long-term planning, NID is preparing for changing conditions while continuing to provide reliable water for homes, farms, businesses, recreation, and the environment.

Looking Ahead

Climate change isn't only about the water that falls from the sky. It's about what happens after it lands.

A few degrees of warming can change how water is stored, how quickly it moves, and how much ultimately reaches the places that depend on it.

By understanding those connections, NID is preparing for a future where every drop matters.