Facebook on Thursday activated its Safety Check feature for Chennai, which lets users mark themselves as safe as a means to notify their friends and family members might know that they were alright.

Google has also published a crisis response page, with resources such as links to emergency helpline numbers, aggregating data on relief centres, and crowdsourced maps that mark out water logged roads and streets with slow traffic etc.

Major telecom companies such as BSNL, Airtel, Vodafone, RCom and Aircel are offering free talktime to their customers in Chennai.

Digital recharge company Paytm is also chipping in to help residents. "Residents can call on 18001030033 and share the mobile number that they want to get topped-up. Paytm will facilitate a Rs. 30 recharge instantly free of cost.

Practo, a heath app, released a list of verified doctors and hospitals.

Ola, the online taxi hailing service, sending out boats to rescue people in the water logged areas and also provided raincoats and umbrellas, for rowers as well as passengers.

Zomato has started with ‘Meal for Flood relief’ delivery service initiated on Wednesday afternoon.

Even though Prime Minister Narendra Modi Ji has ensured his support to the people, the surge in death toll is worrying. City has till now lost 251 lives.