thank you for joining us. we have heard from eight candidate on this stage. we have two democratic presidential candidates left. answering voters questions about the climate emergency. scientists tell us we are seeing the consequences of the climate crisis now. that will be cross a massive tipping point if the world warms more than 1.5 degrees celsius. we have already warmed up by one degrees since the industrial revolution. we're half way there already. right now, as you know, the carolinas are bracing for dorian and potentially life threatening storm surge. for the latest now let's go to the cnn weather center. >> i wouldn't be surprised if this storm reaches category 3 status. it's one mile miles per hour shy of the that. as far as the winds go. with 110 miles per hour winds. it has been intensifying a little bit throughout the late afternoon and evening. gusts of 130.