A dense blanket of fog has been lingering over California's Central Valley for weeks, with the weather pattern drawing ...

A massive fog bank that has been blanketing much of California's Central Valley with low-lying clouds since Thanksgiving time has prompted fears online of a mysterious and harmful "radiation fog," but ...

Add Yahoo as a preferred source to see more of our stories on Google. While California's Central Valley was experiencing a persistent form of "radiation fog" in late 2025, the fog wasn't radioactive.

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A thick layer of fog has smothered California’s Central Valley for ...

While California's Central Valley was experiencing a persistent form of "radiation fog" in late 2025, the fog wasn't radioactive. In fact, radiation fog is the most common type of fog in most of the ...