 People in flood-prone areas have been warned to find safe shelter. At least six were killed when barrel blasted the southeast Caribbean. Roads here in the U.S. will be packed today. Triple A predicts 71 million Americans will travel over the Fourth of July holiday, 60 million by car. Spokeswoman Aixa Diaz. What we're seeing is that people are going to go on their trips no matter what. And especially this summer, we're seeing the numbers even bigger than last summer, which was also a record-setting summer.