As many as 10 people were killed after heavy rain lashed several parts of southern districts in the last two days, disrupting normal life, Tamil Nadu Chief Secretary Shiv Das Meena said on Tuesday.

The senior bureaucrat said the forecast of heavy rain by the India Meteorological Department (IMD) was also 'wrong' as extremely heavy rain was received in the affected districts within two days.

"Ten people have died in Tirunelveli and Tuticorin districts due to rain. While some lost their lives due to wall collapse, some died due to electrocution," he told reporters at the Secretariat.

Giving some details about the rain, he said southern districts, particularly Tirunelveli and Tuticorin witnessed record rainfall and flooding.

In view of heavy rain, a holiday has been declared for schools and colleges in Thirunelveli and Tenkasi districts. Similarly, a general holiday has been declared for Thuthukudi district.

Train services were also hit on Wednesday due to heavy rain in these districts. The Southern Railway released a list of cancelled/partial cancelled trains.