Karnataka hits 32% rainfall deficit in 2026 monsoon. Karnataka recorded 32% rainfall deficit during 2026 southwest monsoon season, marking state's highest shortfall since 1918, according to IMD. The deficit has raised concerns about water availability, particularly if the upcoming northeast monsoon also delivers below-normal rainfall. Between June 1 and September 30, Karnataka received 563.7 mm of rainfall against normal 831.8 mm, IMD data shows.