Harvey has regained tropical storm strength as it drifts in the Gulf of Mexico toward Texas and forecasters say it could become a hurricane.
By early Thursday, the storm's maximum sustained winds had increased to near 45 mph (70 kph). The U.S. National Hurricane Center says additional strengthening is expected and Harvey could become a hurricane on Friday.
The tropical storm is centered about 410 miles (660 kilometers) southeast of Port Mansfield, Texas, and is moving northwest near 7 mph (11 kph).
In Texas, Gov. Greg Abbott has ordered the State Operations Center to elevate its readiness level, making state resources available for possible rescue and recovery actions. Abbott also pre-emptively declared a state of disaster for 30 counties on or near the coast to speed deployment of state resources.