Florida Keys under hurricane warning as Isaac tracks North, preparations underway
5:40 PM, Aug 25, 2012
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KEY WEST, FL - AUGUST 25: A man installs storm shutters on Duval Street on August 25, 2012 in Key West, Florida. Residents in the Florida Keys are preparing after a Hurricane Warning was issued as Tropical Storm Isaac tracks north. (Photo by Marc Serota/Getty Images)

Key West, Florida. Residents in the Florida Keys are preparing after a Hurricane Warning was issued as Tropical Storm Isaac tracks north. (Photo by Marc Serota/Getty Images)

KEY WEST, FL - AUGUST 25: Two girls enter a K-Mart store on August 25, 2012 in Key West, Florida. Residents in the Florida Keys are preparing after a Hurricane Warning was issued as Tropical Storm Isaac tracks north. (Photo by Marc Serota/Getty Images)

KEY WEST, FL - AUGUST 25: A man secures his boat on August 25, 2012 in Key West, Florida. Residents in the Florida Keys are preparing after a Hurricane Warning was issued as Tropical Storm Isaac tracks north. (Photo by Marc Serota/Getty Images)

KEY WEST, FL - AUGUST 25: Two men install storm shutters on Duval Street on August 25, 2012 in Key West, Florida. Residents in the Florida Keys are preparing after a Hurricane Warning was issued as Tropical Storm Isaac tracks north. (Photo by Marc Serota/Getty Images)

KEY WEST, FL - AUGUST 25: A man installs storm shutters on Duval Street on August 25, 2012 in Key West, Florida. Residents in the Florida Keys are preparing after a Hurricane Warning was issued as Tropical Storm Isaac tracks north. (Photo by Marc Serota/Getty Images)

KEY WEST, FL - AUGUST 25: A man installs plywood on windows and doors on Duval Street on August 25, 2012 in Key West, Florida. Residents in the Florida Keys are preparing after a Hurricane Warning was issued as Tropical Storm Isaac tracks north. (Photo by Marc Serota/Getty Images)

KEY WEST, FL - AUGUST 25: A man installs storm shutters on Duval Street on August 25, 2012 in Key West, Florida. Residents in the Florida Keys are preparing after a Hurricane Warning was issued as Tropical Storm Isaac tracks north. (Photo by Marc Serota/Getty Images)

KEY WEST, FL - AUGUST 25: Two men install storm shutters on Duval Street on August 25, 2012 in Key West, Florida. Residents in the Florida Keys are preparing after a Hurricane Warning was issued as Tropical Storm Isaac tracks north. (Photo by Marc Serota/Getty Images)

KEY WEST, FL - AUGUST 25: A woman installs storm shutters on Duval Street on August 25, 2012 in Key West, Florida. Residents in the Florida Keys are preparing after a Hurricane Warning was issued as Tropical Storm Isaac tracks north. (Photo by Marc Serota/Getty Images)
FLORIDA KEYS -- The Florida Keys is preparing to feel Isaac's impact. Tourists are being advised to evacuate ahead of the major effects of the storm.