Sally Strengthens to Hurricane Force

Sally strengthened into a category 1 hurricane on Monday on the Saffir-Simpson scalea s it headed toward southeastern Louisiana, the U.S. National Hurricane Center (NHC) said.

"Additional strengthening [is] possible before the center crosses the northern Gulf Coast," the Miami-based weather forecaster added.

The second storm in less than a month to threaten the region, Sally is forecast to strengthen on Monday and bring heavy rains and winds of up to 85 miles per hour (137 km/h).

Mississippi and Louisiana issued mandatory evacuation orders to residents of low-lying areas, and Louisiana Governor John Bel Edwards appealed for a federal disaster declaration and advised people living in Sally's path to flee.

Residents of southwest Louisiana are still clearing debris and tens of thousands of homes are without power after Hurricane Laura left a trail of destruction.

Energy companies scrambled to pull workers from offshore oil and gas production platforms. Chevron Corp, Equinor and Murphy Oil Corp shut in wells as a precaution, and refiner Phillips 66 halted processing at its Alliance refinery on the Louisiana coast.

At 7 a.m. CDT, Sally was 115 miles southeast of the mouth of the Mississippi River, packing winds of 65 miles per hour, according to the NHC.

It warned the storm's advance would slow in the next two days, dumping 8- to 16-inches (20-40 cm) on the coast and causing widespread river flooding.