On Saturday, the second-highest level, Level 4, will be in effect at the Buch, Marzahn and Tempelhof stations. Level 3 remains in effect in Dahlem. Level 4 is already in effect in nine districts in Brandenburg as well. According to the WBI, several districts could reach the highest level, Level 5, on Saturday. Temperatures will also rise in the coming days. On Saturday, temperatures in Berlin are expected to reach up to 37 degrees. According to the Berlin Forestry Department, the only natural cause of fire in the local forest ecosystem is a lightning strike, which occurs extremely rarely.