California Central Valley fog, poor Bay Area air quality explained

It's been very foggy across Central California this winter, with the longest stretch of non-stop foggy days since the 1970s. But why has it been so foggy?

Stubborn Tule fog lingers across California’s Central Valley

Dense tule fog has gripped the Central Valley, cutting visibility on I‑5 and Highway 99. Where it's worst, driving safety ...

Tule fog grips California’s Central Valley with no relief in sight

Dense tule fog has gripped the Central Valley, cutting visibility on I‑5, 80 and 99. Where it's worst, driving safety tips, ...
Los Angeles Times

California valley fever cases hit record highs again in 2025, state reports

Valley fever cases continue to climb in California Health officials are urging people to be careful in areas known to harbor the disease-causing fungus and to tell a doctor if they have cough, fever, ...
Los Angeles Times

Valley fever cases are expected to spike in California. Here’s how locals, hikers and tourists can avoid it

The number of cases of valley fever in California are trending toward setting a new record Health experts say climate change could result in prolonged dry seasons that can lead to an increase in ...
Yahoo

California valley fever cases hit record highs again in 2025, state reports

A tractor plows a field Paso Robles. Valley fever is a fungal infection spread through dust and has increased in frequency and geography in the Central Valley. (Jason Armond / Los Angeles Times) The ...