According to the India Meteorological Department (IMD), yellow and orange alerts have been issued in Tamil Nadu till Thursday (20 November);
• On Sunday (16 November), an orange alert for very heavy rainfall, thunderstorm, lightning and squalls has been issued in Cuddalore, Mayiladuthurai, Thiruvarur and Nagapattinam.
• On Sunday (16 November), a yellow alert for thunderstorm, lightning and squalls has been issued in Chennai, Chengalpattu, Kancheepuram, Thiruvallur, Ranipettai, Thiruvannamalai, Puducherry, Perambalur, Nilgiris, Coimbatore, Thiruppur, Dindigul, Theni, Madurai, Virudhunagar, Tenkasi, Thirunelveli, Kanyakumari, Thootukudi, Sivagangai. Additionally, a warning for heavy rainfall is also in place for Thanjavur, Pudukottai, Ramanathapuram and Villupuram.
• On Monday (17 November), an orange alert for very heavy rainfall, thunderstorm, lightning and squalls has been issued in Nagapattinam, Thiruvarur, Karaikal, Mayiladuthurai, Kancheepuram, Thiruvallur, Thirunelveli and Thootukudi.
• On Monday (17 November), a yellow alert for thunderstorm, lightning and squalls has been issued in Chennai, Chengalpattu, Ranipettai, Thiruvannamalai, Kallakkurichi, Ariyalur, Perambalur, Nilgiris, Coimbatore, Dindigul, Theni, Madurai, Virudhunagar, Tenkasi, Sivagangai. Additionally, a warning for heavy rainfall is also in place for Puducherry, Villupuram, Cuddalore, Thanjavur, Pudukottai, Kanyakumari and Ramanathapuram.
• On Tuesday (18 November), an orange alert for very heavy rainfall, thunderstorm, lightning and squalls has been issued in Chennai and Chengalpattu. Rest of the state is under a yellow alert.
• On Wednesday and Thursday (19-20 November), the entire state is under a yellow alert.
