 Tropical storm Beryl has strengthened into the first hurricane of the Atlantic season. On Saturday, the National Hurricane Center said Beryl is expected to become a dangerous major hurricane by the time it hits the Caribbean in coming days. Its path is still uncertain, though. Those living along the Gulf Coast of the U.S. and Mexico are being urged to keep a close eye on the direction of the storm. That may be part of the reason millions have already packed airports and highways ahead of this coming Fourth of July holiday weekend.