Cyclone Isaias kills four as it moves north through U.S.

Post-tropical cyclone Isaias has resulted in at least four deaths across the southeastern United States after making landfall near Destin, Florida, as a Category 2 hurricane. The storm brought flooding, tornado risks, and power outages to 440,000 customers across Florida, Alabama, and Georgia.

The National Hurricane Center warned of potential flash flooding and landslides as the storm tracks inland toward the Southern Appalachians. Officials have reported storm-related fatalities caused by falling trees and improper generator use. The U.S. Department of Energy authorized the release of 4 million barrels of reserve crude to mitigate impacts on the Gulf Coast oil refining hub.

Editor's note: The brief omits that the storm moved inland and caused fatalities from falling trees, and it includes extra details about the US DOE that were not in the source summary (though present in the full text).