ATHENS (Reuters) - Four people were injured after lightning struck the Acropolis Hill area in Athens on Wednesday, an ambulance service official said.

LONDON (Reuters) - Two environmental activists climbed onto the roof of a train in London's Canary Wharf financial district on Wednesday as part of a third day of action to force Britain to take more radical measures to avert climate change.

LONDON, April 17 (Reuters) - Two environmental activists climbed onto the roof of a train in London's Canary Wharf financial district on Wednesday as part of a third day of action to force Britain to take more radical measures to avert climate change.

(Reuters) - Tornadoes and thunderstorms will hit the U.S. South and Midwest for a second time this week, starting Wednesday afternoon and pushing eastward, forecasters said.

LONDON, April 17 (Reuters) - Two climate change activists climbed onto the roof of a train at Canary Wharf's Docklands Light Railway station in London as part of a third day of action to pressure politicians to take more radical measures to protect the environment.

(Reuters) - A second wave of tornadoes and thunderstorms in less than a week is forecast to hit states in the U.S. South and Midwest on Wednesday then move eastward, with Oklahoma expecting hail bigger than golf balls.

April 16 (Reuters) - United Airlines on Tuesday reported a better-than-expected jump in first-quarter profit as it sold more tickets and cut costs, standing by its 2019 profit target even as its Boeing Co 737 MAX jets remain grounded.

NAIROBI, April 16 (Reuters) - Kenya is likely to suffer from worsening food shortages and water scarcity as the rainy season fails, its meteorological department said on Tuesday.

LONDON (Reuters) - Police have arrested 209 people in two days of protests after climate-change activists blocked some of London's most important junctions including Oxford Circus and Marble Arch, causing traffic chaos.