At least 4 dead as Isaias brings threat of floods across the Southeast

Isaias made landfall Friday night near Destin on Florida’s northern Gulf Coast. It arrived as a Category 2 hurricane, then weakened to a post-tropical cyclone within hours. The storm still mattered because its broad circulation continued producing strong winds, heavy rain, flooding, and storm surges across the Southeast.

The storm moved north into Alabama on Saturday. Flood watches covered parts of the southeastern United States and the southern Appalachians. Forecast rain totals reached 3 to 6 inches in many areas, with parts of Georgia and the Carolinas possibly receiving up to 10 inches.

Its effects spread well beyond Florida and Alabama. Power outages were reported across Florida, Alabama, Georgia, Mississippi, South Carolina, North Carolina, and Tennessee. The storm was expected to continue threatening the region through the weekend before dissipating Sunday.

A post-tropical cyclone is a storm that has lost the characteristics used to classify it as a tropical storm or hurricane. That change does not mean the storm becomes harmless. Its circulation can continue moving winds and moisture over a wide area, even after its official category disappears.

Isaias weakened from a Category 2 hurricane to a post-tropical cyclone within hours of landfall. Yet it continued producing strong wind gusts and heavy rain as it moved into northern Alabama. The National Hurricane Center kept flood watches active across parts of the Southeast and southern Appalachians.

Rain from a weakened system can still overwhelm drainage, rivers, and low-lying communities. The article forecast 3 to 6 inches in many places, with up to 10 inches possible in parts of Georgia and the Carolinas. Isaias was expected to dissipate Sunday, but hazards continued beforehand.

Isaias caused a large regional emergency even after weakening. At least four people died, with two fatalities in Alabama and two in Florida. Tens of thousands of people evacuated, while more than 700,000 customers across the Southeast remained without electricity.

The outage totals showed the storm’s reach. Florida had 422,357 outages and Alabama had 200,930. Georgia reported 44,877, while Mississippi, South Carolina, North Carolina, and Tennessee also recorded outages. Two deaths involved trees falling on homes, according to officials.

Rain created another major threat. Forecast totals were generally 3 to 6 inches, but parts of Georgia and the Carolinas could receive up to 10 inches. Flood watches remained in effect, and the storm was expected to continue bringing wind, flooding, and storm surges through the weekend before dissipating Sunday.

Storm strength is not measured only by its category. A weakening system may still contain a broad wind field and large stores of tropical moisture. When that moisture falls quickly, drainage systems and waterways can be overwhelmed, causing flash floods. Strong winds can also push seawater inland, creating storm surges.

Isaias showed this pattern after landfall. It weakened to a post-tropical cyclone but continued producing strong wind gusts and heavy rain in northern Alabama. Forecasts warned of 3 to 6 inches of rain across parts of the region, with up to 10 inches possible in parts of Georgia and the Carolinas.

Wind shifts and unstable air around a tropical system can also support brief tornadoes, although the article does not report tornadoes from Isaias. The storm was still expected to bring powerful winds, flooding, and surges through the weekend, despite its weakening status.

Storm hazards became deadly when wind damaged trees, homes, and other structures. Officials said two people died after trees fell on their homes. A woman in Escambia County, Florida, died after a tree fell on a house, and a person in Birmingham’s Huffman area was killed in another tree-related incident.

Buildings also suffered severe damage. In Gulf Breeze, Jayme Mitich and her 13-year-old daughter hid under a mattress as the storm tore part of their roof away. Their apartment filled with insulation and broken beams, while nearby winds uprooted trees and flipped a truck. The article does not report injuries to them.

Another Florida death involved a running generator inside a closed garage. Deputies found the man dead, and four family members, ages 72, 24, 5, and 4, went to a hospital for non-life-threatening treatment. The incident shows why generators must not run in enclosed spaces.

The federal government released oil because Isaias disrupted energy operations and threatened fuel supplies. The Energy Department said emergency exchanges could help maintain refinery operations, limit interruptions, and preserve access to affordable, reliable, and secure energy for families and businesses.

The department authorized exchanges of as much as 4 million gallons of crude oil from the Strategic Petroleum Reserve. Exxon Mobil and BP America were each authorized for up to 2 million barrels. They must return more barrels in 2027 than they withdrew, according to the department’s statement.

The mechanism is temporary replacement supply. Refineries can receive crude when storm-related disruptions make normal deliveries or operations harder. That can help keep facilities running and reduce pressure on fuel availability. The article does not provide a forecast for prices or say exactly how long the exchanges will last.

Hurricanes begin over warm tropical or subtropical ocean water. Heat from the water causes evaporation, and moist air rises into thunderstorms. As the vapor condenses, it releases heat, helping lower air pressure and strengthen the storm’s circulation. A storm can intensify when warm water continues feeding this process.

A mature hurricane contains organized thunderstorms around a rotating center. Warm water supplies moisture and energy, while the atmosphere must allow the storm to stay organized. If those conditions continue, winds can increase and the system can reach hurricane strength. Isaias made landfall as a Category 2 storm near Destin, Florida.

After moving over land, a hurricane usually weakens because it loses access to warm ocean water. Land also creates friction and disrupts the circulation. Isaias weakened to a post-tropical cyclone within hours, but its remaining moisture and winds still caused flooding, outages, and damage across the Southeast.