You are now in California and the U.S. category.

Two major California canals – the California Aqueduct and the Delta-Mendota Canal – have been significantly impacted by subsidence which the state says is caused by groundwater pumping in the Central Valley. Land subsidence happens, according to the U.S. Geological Survey, when large amounts of groundwater have been withdrawn from certain kinds of rocks, such as fine-grained sediments. The water is partially responsible for holding the ground up. With the absence of that water the ground sinks. One of the concerns of this phenomenon is that once an aquifer collapses in upon itself it can no longer refill.

Going, going, but not gone yet.  About 47 percent of California still faces a drought, and the conditions are severe in 11 percent of the state, according to the most recent weekly report from the U.S. Drought Monitor. Some 83 percent of the state was in the monitor’s second-most severe category one year ago. The dramatic changes in the drought map comes amid a rainy season marked by a series of moisture-packed atmospheric rivers that drenched the parched West Coast and dumped copious amounts of snow in the Sierra Nevada. All of this rain has ended the drought in most of Northern California.

California water regulators on Wednesday extended emergency drought regulations, despite calls to eliminate them after heavy rain and snow this winter. The action by the State Water Resources Control Board in Sacramento extends the drought rules which were set to expire at the end of this month, until the agency can reassess the state’s water situation in May when California’s rainy season typically draws to a close. Rain has refilled state reservoirs, and major snow storms have boosted water supply. Drought conditions have eased across most of the state, and Northern California has emerged from the drought.