California's Snowpack Lingers, Raising Flood Concerns.

80% of the Sierra Nevada snowpack in California hasn't melted yet, posing a risk of significant flooding in low-lying areas between Fresno and Bakersfield. The snowpack was 254% of its historical average on May 1, the second highest reading since 1950. Flood experts are worried about flooding in the Tulare Lake Basin and Southern San Joaquin Valley. The snowpack is expected to begin melting more rapidly in late May and early June, posing a risk to earthen levees that are not designed to an extremely high standard.