Ukraine will introduce yellow and red air alert levels, with yellow generally warning of drone raids and red signaling missiles, ballistic or large-scale attacks, President Volodymyr Zelensky said on Wednesday, Sept. 2.According to a statement posted by Zelensky, Prime Minister Serhii Koretskyi briefed him on measures being prepared in response to Russia’s changing attack tactics, particularly its use of drones to disrupt civilian life and economic activity.JOIN US ON TELEGRAMFollow our coverage of the war on the @Kyivpost_official.“People must understand absolutely clearly what exactly they need to respond to and how,” Zelensky said.What will the yellow and red air alerts mean?Yellow alerts will be generally issued during drone raids, while red alerts will indicate missile threats, including the risk of ballistic strikes, as well as large-scale attacks.The General Staff and Ukraine’s Air Force, together with the Ukrainian government, defense ministry, interior ministry, and state emergency services, will determine which threats qualify for each level. The criteria will be reviewed weekly.Different siren sounds are also being prepared for the two threat levels, allowing residents to identify the danger from the warning signal.Ukraine has already stopped sounding the siren a second time to mark the end of an air alert. Sirens are now activated only when an alert begins, while information about the all-clear is provided through other warning channels.Zelensky also ordered officials to introduce more precise geographic targeting of alerts so warnings and restrictions apply only to areas facing an actual threat.