Hourly Weather - San Francisco, United States

At a Glance President Donald Trump declared a federal emergency in Louisiana Thursday evening.Mandatory evacuations were ordered for parts of Plaquemines, LaFourche and Jefferson parishes in Louisiana.Voluntary evacuations were announced for New Orleans residents living outside the levees.The Louisiana National Guard is on standby for rescues and assistance. As Tropical Storm Barry approaches the Louisiana Gulf Coast, communities in the storm's projected path are making final preparations for what is expected to be days of potentially life-threatening flooding rain. "This...