A state of emergency has been declared in Florida’s Manatee County as a toxic wastewater reservoir is on the brink of collapse. Hundreds of families have been ordered to evacuate. Sources tell NBC News that if the wall gives way, a 15 to 20 foot wall of water could flood homes and spill into Tampa Bay. NBC’s Sam Brock reports for Sunday TODAY. » Watch TODAY All Day: http://www.youtube.com/today » Subscribe to TODAY: http://on.today.com/SubscribeToTODAY » Watch the latest from TODAY: http://bit.ly/LatestTODAY About: TODAY brings you the latest headlines and expert tips on money, health and parenting. We wake up every morning to give you and your family all you need to start your day. If it matters to you, it matters to us. We are in the people business. Subscribe to our channel for exclusive TODAY archival footage & our original web series. Connect with TODAY Online! Visit TODAY's Website: http://on.today.com/ReadTODAY Find TODAY on Facebook: http://on.today.com/LikeTODAY Follow TODAY on Twitter: http://on.today.com/FollowTODAY Follow TODAY on Instagram: http://on.today.com/InstaTODAY Follow TODAY on Pinterest: http://on.today.com/PinTODAY #SundayTODAY Toxic Wastewater Reservoir In Florida In Danger Of Collapse | Sunday TODAY