Weather services have issued a warning for locally heavy thunderstorms from 3 p.m. on Monday until midnight. The alert covers 21 wilayas in the country’s interior and south. The areas named are Tiaret, Aïn Defla, Tissemsilt, Blida, Bouira, Médéa, Bordj Bou Arréridj, Sétif, Mila, Batna, Oum El Bouaghi, Constantine, El Tarf, Guelma, Souk Ahras, Tébessa, Khenchela, In Salah, Bordj Badji Mokhtar and Tamanrasset.