Beachgoers scrambled from their sunbathing spots in Ovar, Portugal, as conditions took a dramatic turn on Sunday, June 29. Footage here shows the sky darkening as a huge roll cloud looms, with winds picking up too. The video was recorded by Nuno Pereira at Praia do Furadouro Sul. According to the Portuguese Institute of the Sea and Atmosphere (IPMA), roll clouds, which are “relatively rare”, were spotted at several locations along the Portuguese coast on Sunday. | ABC 7 Chicago