The 1964 Alaska earthquake caused a tsunami in March, completely devastating several North Coast towns and resulting in 14 deaths and an economic loss of $14 million in Del Norte County alone. The six days from December 19–24, 1964 were the wettest ever recorded at many stations on the North Coast. Every major stream in the North Coast produced new high values of extreme peak flows. 34 California counties were declared disaster areas. Heavy rainfall in the San Francisco Bay region on January 3–5 triggered thousands of debris flows from Santa Cruz Country to Contra Costa and Sonoma Counties, as well as flooding along the San Lorenzo River, Soquel Creek, and Aptos Creek in Santa Cruz County. Floods along creeks in Marin County plus added significant amounts of sediment to Tomales Bay. The landslides caused at least $66 million in damage. Landslides caused 25 of the 33 storm-caused deaths. Total estimated storm-related losses were $280 million. On February 11, 1986 a vigorous low pressure system drifted east out of the Pacific, creating a Pineapple Express that lasted through February 24 unleashing unprecedented amounts of rain on northern California and western Nevada. The nine-day storm over California constituted half of the average annual rainfall for the year. Record flooding occurred in three streams that drain to the southern part of the San Francisco Bay area. Extensive flooding occurred in the Napa and Russian rivers. Napa, north of San Francisco, recorded their worst flood to this time while nearby Calistoga recorded of rain in 10 days, creating a once-in-a-thousand-year rainfall event. Records for 24-hour rain events were reported in the Central Valley and in the Sierra. One thousand-year rainfalls were recorded in the Sierras. The heaviest 24-hour rainfall ever recorded in the Central Valley at occurred on February 17 at Four Trees in the Feather River basin. In Sacramento, nearly of rain fell in an 11-day period. System breaks in the Sacramento River basin included disastrous levee breaks in the Olivehurst and Linda area on the Feather River. Linda, about north of Sacramento, was devastated after the levee broke on the Yuba River's south fork, forcing thousands of residents to evacuate. In the San Joaquin River basin and the Delta, levee breaks along the Mokelumne River caused flooding in the community of Thornton and the inundation of four Delta islands. Lake Tahoe rose as a result of high inflow. The California flood resulted in 13 deaths, 50,000 people evacuated and over $400 million in property damage. 3000 residents of Linda joined in a class action lawsuit Paterno v.