(Reuters) - A strong tropical wave and associated broad area of low pressure moving westward across the northern Leeward Islands and Puerto Rice still has a 60 percent chance of becoming a tropical cyclone in the next 48 hours, the U.S. National Hurricane Center said on Wednesday.

LONDON (Reuters) - Nigel Farage, an anti-immigration politician who was a figurehead of the successful campaign to get Britain out of the European Union, intends to address a Donald Trump rally on Wednesday, a spokesman said.

OSLO, Aug 24 (Reuters) - Man-made greenhouse gases began to nudge up the Earth's temperatures almost 200 years ago as the Industrial Revolution gathered pace, far earlier than previously thought, scientists said on Wednesday.

(Reuters) - Tropical Storm Gaston could still reach hurricane strength on Wednesday, but is expected to weaken on Thursday, the U.S. National Hurricane Center (NHC) said in its latest advisory.

ROME, Aug 24 (Reuters) - A strong earthquake brought down buildings in mountainous central Italy early on Wednesday, trapping residents and sending others fleeing into the streets. A preliminary count some 12 hours after the quake struck put the death toll at 73.

LONDON, Aug 24 (Reuters) - The U.S. summer driving season ends with Labor Day on Sep 5, and the attention of the energy markets is already switching to the forthcoming winter heating season.

CHICAGO, Aug 24 (Reuters) - Two of the world's biggest agricultural trading houses bungled crop sales they made on behalf of U.S. farmers this year because of what one described as "unique" price moves for soybeans, prompting both to take rare steps to keep disgruntled customers.

ATHENS, Aug 24 (Reuters) - Serious challenges lie ahead in dealing with Europe's migrant crisis, the United Nations' refugee chief said on Wednesday as he urged the European Union to help its frontline member-country Greece manage the flows of people.