Fortunately the dam held, and the residents of Oroville were able to return to their homes. For the most part the story has since faded from the news. However, the damage remains.
When the crisis was at its peak, you may have heard about what specifically went wrong with the dam. The main spillway was damaged when the dam operators attempted to release some water to control the depth of Lake Oroville. Essentially, a crater unexpectedly emerged in the middle of the spillway, and when the water flowed through that hole, it eroded the soil beneath.