In the United States, hurricane Nate has made landfall near the mouth of the Mississippi River in Louisiana. According to the US National Hurricane Center, the storm with maximum sustained winds of 137 kilometres per hour is moving north and a second landfall is expected on the Mississippi coast later.<br/><br/>Louisiana, Mississippi, Alabama and parts of Florida have issued hurricane warnings and evacuation orders.<br/><br/>A state of emergency has been declared in four southern US states with Hurricane Nate gathering strength. Louisiana, Mississippi, Alabama and parts of Florida have issued hurricane warnings and evacuation orders. The measures apply to parts of the city of New Orleans, which was devastated by Hurricane Katrina 12 years ago. <br/><br/>Nate killed at least 25 people in Nicaragua, Costa Rica and Honduras. The tropical storm has since strengthened and is now a category one hurricane on the Saffir-Simpson scale. Although not as strong as last month's Maria and Irma, Nate is expected to bring strong winds and storm surges.<br/><br/>Five ports along the Gulf Coast have also been closed to shipping as a precaution. Most oil and gas platforms in the US Gulf of Mexico have evacuated their staff and stopped production ahead of the storm.<br/><br/><br/>