The Baltic sea is the youngest sea in the World and according scientist the Wold’s largest dead zone suffocating sea. Lithuanian seaside shallow sandy shores are one of the most variable and most sensitive to environmental changes places on the earth. Baltic Sea level rises each year by about 6.5 mm. Coast abrasion intensity increases at the temperature of growth, which is mainly caused by our latitudes warm winter. Last time the Baltic Sea was frozen in 1963. The climate changing in middle latitudes increased cyclonic activity. There is a growing number of extreme situations when an unusually hot summer with ever more frequent storms with heavy rainfall. On 11 of July 2016 I had chance to observe the birth of Arcus cloud phenomenon next to Curonian Spit in Lithuania on 11.07.2016.Same day the natural disasters occurred with stormy rain and heavy hail over half of the Lithuania.