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The staggering scale and grandeur of the Sierra Nevada make for a breathtaking autumn spectacle when the trees explode in gold and amber. And it's not too late to see this glorious show.

After days of record-breaking temperatures, California's October heat wave is beginning to retreat. A cooling trend is expected to begin Tuesday through the rest of the week.

An experimental program seeks to protect California almond trees from a pesky moth by using X-rays to sterilize the insects.

Michael Regan said the EPA is working with state and federal partners to address elevated lead levels in drinking water in South L.A. communities.

New mothers are more likely to suffer depression if they are exposed to certain types of air pollution in the second trimester of pregnancy, researchers say.

The hurricane leveled Asheville and other towns in western North Carolina. The push for optimism about our climate future rings hollow right now.

Although California dairy farmers anticipated a bird flu mortality rate of less than 2%, some say between 10% and 15% of infected cattle are dying.

The CDC plans to knock on the doors of randomly selected homes in the Tijuana River Valley later this month to ask them about how the sewage crisis has affected their wellbeing.

The recently completed removal of dams on the Klamath River is raising hopes of rebuilding the population of threatened spring-run chinook salmon.

Why won't the U.S. Forest Service allow a fire fighting helicopter to fly at night?