President Obama addresses hurricane concerns

Washington, D.C. (CNN) -- President Barack Obama urged people in coastal northeastern Florida and Georgia to heed the instructions of local officials as Hurricane Matthew approached, saying that there is significant potential for dangerous storm surges, flooding, loss of life and severe property damage.

"This is still a really dangerous hurricane," Obama said at the White House Friday.

"We're not going to know for three, four, five days what the ultimate effects of this (storm) are."