California needs clean, safe and reliable water supplies. We also would greatly benefit from the improved flood management Proposition 3 would provide. The measure on the Nov. 6 ballot includes $400 million to implement the Central Valley Flood Control Plan and repair Oroville Dam. Climate change is worsening the threat of floods. Sacramento is the nation’s second most flood-prone city after New Orleans. We need all the help we can get to improve our levees, widen the floodplain to accommodate higher Sacramento River flows and improve and repair upstream flood control dams such as Oroville.