The river’s vast drainage area is divided into two regions: the Upper and Lower Basin. Around 90% of the river’s flow originates in the Upper Basin.

Epiphytes dangle from trees at the Santa Ana National Wildlife Refuge, one of the few surviving tracts of original thorn forest.

San Bernardino Valley, in partnership withWestern Water, City of Riverside Public Utilities, and San Bernardino Valley Water Conservation District, proudly marked the completion of the Santa Ana River ...

Ahead of the rain, crews with the Los Angeles County Department of Public Works cleaned drainage facilities and debris basins, installed additional K-rails near homes and laid out over 1,500 ...

The most extreme Santa Ana wind events happen when a strong inside slider is positioned in the Great Basin, and a strong blocking high pressure is off the coast.

Santa Ana winds are common in Southern California during cooler months. Here’s a look at the often-fierce winds that topple power lines and trees and can turn a spark into a raging wildfire.

Except the Jacuí river basin, which belongs to the Guaíba hydrographic region, the others belong to the Uruguay River Basin ( SEMA, 2012 ). Turvo river basin was delimited at Três Passos gauging ...

"Although work continues throughout the fire, the Santa Ana River drainage is the priority for today," Cal Fire continued. "Additional crews and equipment are focused in this area.

SANTA ANA, Calif. — The seven U.S. states that draw water from the Colorado River basin are suggesting new ways to determine how the increasingly scarce resource is divvied up when the river can’t ...

The project consists of slope stabilization improvements to the Bond, Blue Diamond, and Smith Basins to reduce the risk of erosion during flood events, and improvements to the Santiago Creek channel ...