"Thousands of firefighters are working to contain the blazes of multiple fires across Los Angeles. Months from now when the fires are extinguished and the rain comes, however, a hidden threat could put communities at risk once again.
When the mayor of Las Vegas, N.M., issued a warning in 2022 to its 13,000 residents, it wasn’t over a fire — they had recently lived through the state’s largest wildfire in its history: Calf Canyon/Hermits Peak. The dire warning was that the city had 30 days of clean water left. The 2022 monsoon rains covered the Gallinas watershed, where cleared trees from the Santa Fe National Forest and ash-covered grounds made for flash-flood conditions. The storms introduced massive amounts of carbon from burned trees and plant life into the streams and reservoirs. Water treatment couldn’t keep up, making their stores undrinkable.
Around 60 to 65 percent of the United States’ drinking water comes from forested areas. As fires burn in these areas, they increase the risk of cancer-causing and toxic substances entering water supplies. An estimated 53.3 million U.S. residents who live in areas with significant wildfire risk may face damaged drinking water infrastructure from those flames."
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