Sacramento's risk of flooding is the greatest of any major city in the country . . .
Over the past few decades, our area has experienced significant, sometimes devastating, flooding. The most notable flooding occurred in 1986, 1995, 1997 and 2006. The Sacramento Area Flood Control Agency identifies Sacramento as the nation’s greatest metropolitan flood risk.
1986: In February, 1986 a vigorous low pressure system drifted east out of the Pacific, creating a
Pineapple Express that lasted through February 24 and unleashed unprecedented amounts of rain on northern California. In Sacramento, nearly 10 inches of rain fell in an 11-day period. The overwhelming floodwaters tore bridges from their foundations and punched through levees. The Northern California flood resulted in 13 deaths, 50,000 people evacuated and over $400 million in property damage.
1995: In 1995, heavy rains hit the Sacramento area causing wide-spread localized flooding, in particular in the Arcade, Morrison, Florin, Union and Dry Creeks.
1997: Two years later, a series of tropical storms hit the valley, causing the Cosumnes River to crash through levees in 24 places.
2006: Most recently, the 2005/2006 event earned the name “New Year’s Eve Storm” because it soaked the region and caused widespread, localized flooding during the first days on New Year’s Eve 2005 through the first few days of 2006. And although this flood event was not of the magnitude of those in the past, it did cause residents to be vigilant and question their individual storm readiness.
More than 370 square miles of Sacramento County is within the 100 Year Floodplain and, in addition, many areas within the County have local flood hazard areas. These floodplain maps are available directly from FEMA at the FEMA Map Service website or Sacramento County Online GIS Map Viewer. The public can also view these FEMA maps at the Sacramento County Department of Water Resources office at 827 7th Street, Sacramento CA 95814, Room 102, (916) 874-6851.
The Sacramento County Hazard Mitigation Plan