California state water officials measured the snow near Lake Tahoe on Monday and announced that this year's Sierra Nevada snowpack is among the largest ever on record. The snowpack is at 236% of normal for this time of year, which indicates relief for the three-year drought, but it also raises huge concerns that the snowpack could bring dangerous flooding as it melts through spring and summer. Karla Nemeth, director of the California Department of Water Resources, warned that the Central Valley, especially the southern San Joaquin Valley and Tulare County, is at risk for flooding. The department is working with local agencies to prepare for this. California's Department of Water Resources uses the crucial April 3 measurement to determine how much water it will get for the spring and summer. The state typically relies on the melted snow for about one-third of its water supply. This year's snowpack is also posing severe flood risk this spring in some areas of the state, especially in the San Joaquin Valley. The state is urging Californians to be very mindful of the dangers related to the melting snowpack and is asking people to be aware of flood warnings and never to drive on flooded roads.