Hurricane Erin exploded in strength to a Category 5 storm in the Caribbean on Saturday, rapidly powering up from a tropical storm in a single day, the National Hurricane Center said.

"The National Weather Service in Tucson has issued a Flash Flood Warning for: Eastern Pima County in southeastern Arizona, Until 5:45 p.m. MST. At 4:49 p.m. MST, Doppler radar indicated thunderstorms ...