Debris flows brought on by the strongest atmospheric river of the season swept a car off a southern California highway and into the ocean and left roads submerged in sludge.

Scientists using seismic data tracked groundwater levels beneath the L.A. area. They found heavy rains in 2023 boosted ...

Even in Los Angeles, a city dissected by highways and freeways and with busy ports and train lines, there are still places ...

NASA scientists used satellite measurements to map out local subsidence and uplift across the Golden State, which plays into ...