BROWNSVILLE, Texas (AP) -- Hurricane Dolly has weakened into a tropical storm, but the dangers are not over for residents of south Texas.

The storm is centered near Laredo with top winds of 45 miles per hour. Forecasters say they expect to cancel the tropical storm warning for the Texas coast soon, and what's left of the storm is expected to break up by tomorrow.

But emergency officials in Hidalgo County still are urging residents to stay at home "unless it's life or death." They're concerned about power lines that have fallen or are hanging low over flooded streets and neighborhoods.

During the storm, authorities rescued about 30 families stranded by high water in Cameron county. Power is out to about 60 percent of customers there.

Governor Rick Perry has declared 14 south Texas counties disaster areas and is seeking federal disaster declarations.