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In 2004, FEMA began a project to update and digitize the flood plain maps at a yearly cost of $200 million. The new maps usually take around 18 months to go from a preliminary release to the final product. During that time period FEMA works with local communities to determine the final maps. [3]
California Awareness Floodplain Maps from the California Department of Water Resources; Approximate areas of the Coast, Transverse, and Peninsular Ranges affected by damaging rainstorms Table 1.1 (pp. 10–11) in U.S. Geological Survey Professional Paper |issue=1434
The California Department of Water Resources's schematic map of the Yolo Bypass, 2009. Congress approved the Sacramento River Flood Control Project in 1911, with a plan to divert the water through multiple weirs and bypasses. The Yolo Bypass is one of two major bypasses in the Sacramento Valley that helps deter urban flooding. [5]
Updated maps from Williamson County show an increase of 6,000 structures in the 100-year flood plains. The last information available was from 1994.
As climate change has doubled the likelihood of flooding in California, and is projected to increase runoff from storms by as much as 200 percent to 400 percent, this restored floodplain is ...
The California flood resulted in 13 deaths, 50,000 people were evacuated and over $400 million in property damage. [6] Three thousand residents of Linda joined in a class action lawsuit, Paterno v. State of California Archived May 1, 2009, at the Wayback Machine, which eventually reached the California Supreme Court in 2004. The California high ...
Periods of heavy rainfall caused by multiple atmospheric rivers in California between December 31, 2022, and March 25, 2023, resulted in floods that affected parts of Southern California, the California Central Coast, Northern California and Nevada. [3] [4] The flooding resulted in property damage [5] [6] [7] and at least 22 fatalities. [1]
Northern California saw its wettest winter in almost a century, breaking the record set in 1982–83. [6] The same storm systems also flooded parts of western Nevada and southern Oregon. The damage was estimated at $1.55 billion ($1,926,663,046 today [4]), [3] including damage to California roads and highways estimated at more than $1.05 ...