Hurricane Isaias reaches Category 3 strength: Why storm surge, not just hurricane-force winds, is the biggest threat

Hurricane Isaias, which is quickly approaching the US Gulf Coast region, has been upgraded to a Category 3 hurricane, intensifying the threat of storm surge, rain, and destructive winds, especially in regions like the Florida Panhandle, southern Alabama, and southern Mississippi. Officials stated that the surging waters from the sea could prove to be a more immediate threat to the lives of people living in low-lying areas of the Gulf Coast region.

Florida Governor Ron DeSantis informed citizens of the life-threatening surge and widespread damage. As shelter locations were being set up around the region, the priority has been to evacuate people from the coastal region before the weather got worse.

Why storm surge could pose the greatest danger

When winds from a hurricane push seawater onto the shores, a storm surge takes place. Storm surges lead to flooding that moves inland, particularly in low-lying areas and other areas without any natural barriers.


Also Read | A 2009 military base massacre, 13 deaths and a live-streamed execution: The Nidal Hasan case explained

The problem worsens when the storm surge occurs at high tide. The flooding water will result in blocked roads, flooding of buildings, and difficulty accessing emergency services. Also, fast-moving floodwater might sweep away cars, and roads become unfamiliar.

Speaking at a Friday press conference, DeSantis pointed out that people who disregard evacuation warnings can end up in dangerous situations.

The area between Pensacola and Florida's Big Bend was identified as one where storm surges could be a significant problem.

Also Read | Cornell rape allegations: The key differences between a sworn statement, a police interview and a civil lawsuit

The governor's statement reflected a fundamental rule for hurricane safety – the level of danger cannot be assessed based on wind speed alone. A house may be able to withstand some wind damage, but it will not be safe if the surrounding area is flooded by seawater.

Predictions of storm surge are affected by several factors, such as the hurricane's intensity, forward speed, size, track and coastal shape. Small changes in a storm's path may significantly influence which areas will have the highest water levels.

Category 3 winds put Gulf Coast communities on alert

At the third category of severity, Isaias caused winds of around 120 mph. Hurricanes in this category can destroy structures of houses, cut down trees, and lead to massive blackouts and disruption of utility services.

According to the forecast of the National Hurricane Center, the tropical storm would start hitting some parts of the coastline beginning Friday evening. In fact, the rain was already coming to the coastal regions. It was supposed that conditions would deteriorate as the storm would approach land.

Moreover, forecasters suggested that the hurricane would get weaker after making landfall. It could weaken as it moved to the area between Alabama and Mississippi, becoming a tropical storm by Saturday afternoon.

Nevertheless, the weakening of wind intensity would not mean that the threat disappeared. After the storm hits land, people will still be endangered by flooding, downed trees, destroyed utility poles, and closed roads. Besides, heavy rains can cause flooding even far from the coast.

That is why authorities advised the residents to prepare for the hurricane while it was still possible. It would be harder to evacuate once the wind got stronger and water started to rise.

Evacuations and shelters open across the region

Emergency preparations were taking place in communities along the Gulf Coast as officials tried to get residents and tourists out of vulnerable areas.

Mandatory evacuation orders were issued in several counties along the Florida Panhandle. Alabama Governor Kay Ivey also advised tourists and visitors in Alabama coastal areas to evacuate immediately as the hurricane approached.

Shelters started opening up on Friday to house those who could no longer stay in their houses. Three shelters were scheduled to open in Mobile County, Alabama, in schools. At least four churches in Dothan opened their doors, as well as providing snacks and beverages to those in need of shelter.

The American Red Cross opened overnight shelters in Florida's Panhandle region, including one in the arena of Northwest Florida State College.

These were meant to give shelter to people who were evacuating vulnerable coastal regions. People were advised to follow local emergency officials' instructions, evacuation warnings and not return to restricted areas until it was deemed safe by authorities.

People living near the coast needed to do more than just prepare their property; they had to reach safety before the area became inaccessible due to flooding or high winds.