From coast to coast, more than 121 million Americans are waking up to another day of extreme heat. Meanwhile, Tropical Storm Fred has formed near Puerto Rico, putting Florida and other parts of the South on alert. NBC’s Kristen Dahlgren reports from Central Park, now under a rare excessive heat warning, and TODAY’s Al Roker has the forecast. » 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 #Heat #Weather #HurricaneFred