Climate
7 events, 1875 to 2023; 1 marked as turning points.
1875
Madras Observatory begins daily weather reports
The Madras Observatory started issuing daily weather reports, an early step in organised weather forecasting in south India.
1899
Kodaikanal Solar Observatory founded
Solar research moved from the Madras Observatory to a new observatory at Kodaikanal, where the Evershed effect was discovered in 1909.
2008
Cyclone Nisha floods the Cauvery delta
Cyclonic Storm Nisha made landfall in Tamil Nadu, bringing record rain to Orathanadu and killing at least 189 people in the state.
2015
Extremely heavy north-east monsoon rains flooded Chennai, Kancheepuram, Tiruvallur and Cuddalore, killing hundreds of people.
2016
Kamuthi solar power plant completed
A 648 MW solar power plant built by the Adani group at Kamuthi in Ramanathapuram district was completed.
2019
After a failed monsoon, Chennai's main reservoirs dried up, forcing heavy reliance on tankers and water brought by train from Jolarpet.
2023
Floods in Thoothukudi and Tirunelveli
Record rainfall flooded Thoothukudi and Tirunelveli districts as the Thamirabarani river overflowed.