Chennai: Social network sites and tech companies are playing their part in the rescue operation of Chennai floods.

Facebook activated the "Safety Check" feature for its users in Chennai early on Thursday, while Google has compiled all critical information under its "Crisis Response" tool to provide them relief in the flood-hit city, media reports said.

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As the torrential rains in Chennai continued for the fourth straight day, with power and telephone lines down in many areas owing to flooding, Facebook's Safety Check feature would allow people to mark themselves as "safe" from the floods, Time reported.

The feature, which debuted in October 2014, allows Facebook to ask users whether they're safe if located near a natural disaster. A click or tap on the "I'm Safe" button lets friends and loved ones know straight away. Users can also check to see whether their friends are safe too.

BSNL has announced free calls from BSNL to BSNL network for next seven days. Airtel has announced 10 Airtel to Airtel minutes and 30 rupee recharge. Airtel also announced that 50 MB data will be given all prepaid users.

Paytm also announced a 30 rupee recharge to any customer. All they have to do is call on a given number. MTS is giving free 1 GB data to its all users for next three days.

Zomato has started a meal scheme wherein the company will provide a meal for Chennai residents for each meal purchased via its website. The meal scheme resulted in over 55,000 people across India buying meals and Zomato adding 55,000 from its own side for the people of Chennai.

Ola was the first to give help by providing boats to people stuck in the flood.

Social media users across the country were all praise for the efforts these companies have made.

Other than that people through their Facebook and Twitter accounts are trying to give as much help as possible. In this tragedy, India has come out with hope and fight.

(IANS)