 This summer is expected to be one of the hottest on record, experts reminding parents to keep their kids hydrated in order to prevent heat-related illnesses. ABC News medical correspondent Dr. Darian Sutton also warning about hot car deaths. It's most often children under the age of two when caregivers or parents are planning to take them to daycare and something changed in their schedule and then something happened. So one way to do that is prevent it by making a habit of putting important things into the backseat so that you're always remembering to check it. Chuck Severson, ABC News.