1. Home
  2. Hubs: tools and knowledge
  3. Wildfire Portal

Water

Wildfires can affect water resources by damaging watersheds, degrading water quality and disrupting water supply systems.

Ash, debris and contaminants from burned landscapes can impact rivers, reservoirs and groundwater, while increased demand during firefighting and recovery can place additional pressure on water resources. Explore the latest research, insights and resources on the impacts of wildfires on water and the measures needed to protect water security and strengthen resilience.

Uploaded on
Update
USA: Extreme weather could threaten half of drinking water systems

Climate change could threaten the reliability of half of U.S. drinking water utilities by 2050 through wildfires, heat, floods and rising seas. Experts urge utilities to assess risks and adapt infrastructure to protect safe water supplies.

Yale Climate Connections
Research briefs
US: As wildfires burn, rainfall can strip oxygen from rivers

Runoff from a high-intensity storm during the 2022 McKinney Fire depleted oxygen in the Klamath River to levels lethal to fish, killing aquatic life along nearly 60 miles of one of California's most culturally significant waterways.

United States Geological Survey (USGS)
Update
Wildfires can contaminate nearby homes and water systems

While there are many safety concerns after a wildfire, three deserve particular attention: chemicals in surviving buildings, the safety of drinking water and whether burned lots are ready for rebuilding.

Conversation Media Group, the
Research briefs
CA: After the flames, wildfires pollute drinking water for years

When people think about wildfires, they usually think about flames, smoke and evacuations. However, for many communities, some of the most important damage begins after the fire has passed.

Conversation Media Group, the
Burned forest landscape overlooking a water body
Update
Post-wildfire erosion can threaten water quality for years

Heavy rain is often welcome in California. Some years, we're practically desperate for it. Big rain events replenish reservoirs, refill groundwater, and keep ecosystems alive, but can cause major problems in areas burned by wildfires.

Ebb and Flow
Update
USA: What the historic snow drought means for water, wildfires

Across much of the Western United States, winter 2026 was the year the snow never came. Many ski resorts got by with snowmaking but shut down their winter operations early. Fire officials and water supply managers are worried about summer.

Conversation Media Group, the
Update
Iran: Environmental crises now threaten the regime’s survival

Iran faces severe, regime‑driven environmental collapse—water depletion, pollution, mismanagement and repression of scientists—fueling unrest, economic hardship and growing public anger that now threatens the government’s stability.

Inside Climate News
Grand Canyon National Park South Rim Landscape with North Rim wildfire, forming part of the Dragon Bravo mega fire of Summer 2025
Update
USA: Grand Canyon’s megafire shows the growing threat to water systems

By mid-August, Dragon Bravo was a “megafire,” having burned over 140,000 acres, and was one of the largest fires in Arizona history. It had destroyed more than 70 structures, including the iconic Grand Canyon Lodge, and sent smoke across the region.

Conversation Media Group, the
Uploaded on