Hurricane Isaias intensified into a Category 2 storm Monday with maximum sustained winds of 100 mph as it tracked toward the U.S. Gulf Coast, prompting emergency declarations and mandatory evacuation orders in low-lying coastal counties ahead of an expected landfall within 36 hours.
The National Hurricane Center said Isaias was moving north-northwest at 14 mph and could strengthen further before reaching shore, where forecasters warned of a life-threatening storm surge of up to 9 feet in some areas. Hurricane warnings were issued for a stretch of coastline spanning more than 300 miles.
Governors in the affected states activated National Guard units and opened emergency shelters, while utility companies positioned thousands of linemen for what officials expect to be widespread power outages. Airlines canceled hundreds of flights into regional airports, and ports along the coast halted operations.
Isaias is the ninth named storm of the 2026 Atlantic season, which forecasters at the National Oceanic and Atmospheric Administration had projected would produce above-average activity. The storm gained 35 mph in wind speed over 24 hours, a rapid intensification that meteorologists say has become more common as ocean surface temperatures warm.
"The window for residents to prepare is closing," the National Hurricane Center said in its 11 a.m. advisory. "Those in evacuation zones should leave now, not later."
Emergency management officials in coastal parishes and counties began phased evacuations Sunday evening, prioritizing residents in mobile homes, RV parks, and areas outside levee protection. Shelters were operating at reduced capacity because of ongoing public health protocols, and officials urged evacuees to bring their own supplies.
Retailers along the projected path reported depleted stocks of bottled water, generators, and plywood as residents rushed to prepare. Gas stations in several counties ran dry by Monday morning, according to state emergency management reports.
The storm's projected track put it on course to make landfall near a metropolitan area of more than 1.5 million residents, where local officials ordered the closure of schools and government offices through at least Wednesday. Hospitals began discharging patients who could safely recover at home to free beds for potential storm casualties.
Isaias is expected to weaken rapidly after landfall as it moves inland, but forecasters warned that heavy rainfall of 8 to 12 inches could trigger flash flooding across a swath of the Southeast through midweek.
