Social media users have posted video and pictures of a fireball over southern England.
By Helen Briggs
BBC Environment correspondent
World leaders need to quicken the pace if they are going to fulfil their commitments made at the COP26 climate summit in Glasgow, its president says.
This is the eighth sandstorm to sweep through the country since mid-April, hospitalising hundreds.
By Steve Acton, Daisy Smith and Caroline Lowbridge
Sabrina Dhowre Elba visits Somalia and Kenya on behalf of the International Fund for Agricultural Development.
By Kevin Shoesmith