Cyclone Arnab is expected to cause significant rainfall and gusty winds in Andhra Pradesh, Telangana, Odisha, Bihar, and West Bengal, with Odisha under a red warning for heavy to extremely heavy rainfall in southern districts. These conditions may lead to waterlogging, localised flooding, and disruptions to daily life. Bihar and West Bengal may also experience thunderstorms and lightning, posing risks to residents. Tamil Nadu's southern districts and Western Ghats could see isolated rainfall, while Delhi-NCR and Uttar Pradesh may face changing weather patterns. Karnataka is expected to remain largely unaffected, with minimal impact from the cyclone.