Thousands of homes in the UK were left without water on Saturday when frozen pipes burst due to rising temperatures.
The restaurant tweeted live updates about where water had been restored, while distributing bottled water and offering "community toilets".
We are open for anyone to come in to use toilets, take water, fill up water and if you know any vulnerable people let us known and we will deliver it.
Code word WATER for free margaritas #streatham — El Chico’s Streatham (@ElChicosSW16) March 6, 2018 Report The restaurant’s owner Alper Yagmur said: "I was born and raised in Streatham so I took it upon myself to help the community."
Another said El Chico’s had been "the best source of information" and promised to "pop in for a cheeky drink" to say thanks for their efforts.
— Jason Campbell (@jasondcampbell) March 6, 2018 Report A third echoed the sentiment and said the restaurant had offered services that were not "adequately provided by Thames Water".
@ElChicosSW16 are definitely the heroes in the #Streatham #watergate issues going on.
🙏 #community — Sarah Clark (@Clarkie_01) March 6, 2018 Report El Chico’s was not alone in its efforts to help local communities, as other local businesses have been offering help.
No water?
Local residents are more than welcome to come and use our shower facilities #BalhamLc #thameswater pic.twitter.com/G769hxiPck — Balham LC (@BalhamLC) March 6, 2018 Report A spokeswoman for Thames Water said it has been providing bottled water to "local people and vulnerable customers" in the Streatham area.

Shop owners were today accused of cashing in on London’s water crisis by charging up to £8 for bottles of water as 5,000 homes remained without mains supplies.
Several schools in the area also remained shut today, while one emergency water station had apparently have run out of supplies.
A spokesman for Thames Water today said teams were working “flat out” to locate and repair damaged pipes, bleed airlocks and restore pressure in affected areas.
Venting his frustration online, he wrote today: “Day four with no running water in SW16.
“The thing is, their sole purpose is to make money and they’re a one-off.
They feel lied to after all these messages about service coming back.” One shopkeeper said he “wasn’t surprised” by the water bottle price hike, adding: “I’ve had to pay £20 to go in a taxi to pick up bottles front the wholesalers – it sells out so fast.
Thames Water some answers now would be good.” A mother of three from Streatham, Anna, who gave birth last week, told the Standard: “The lack of any communication or accurate information has been appalling.
“The most stressful thing is not being able to do dishes, I had baby screaming at me for milk but [I had] no clean bottles left.” Dunraven primary and secondary school in Streatham was closed for a second day today.
Sunnyhill primary in Streatham also remained closed, while the Livity special school in Streatham was also closed to all pupils, saying: “Thames Water is dealing with water leaks around Streatham and the school has no water.
“Although the situation is recovering we still need to ask for help from the majority of our customers who do have water.

An area of Birmingham was "gridlocked" as people queued for bottles of water.
Supplies in the city had been affected by burst pipes due to the recent severe weather, with Severn Trent handing out free bottled water at Sainsbury’s, in Northfield, on Monday.
Severn Trent said there were delays but the hand-out was "good natured" and water was back on Tuesday morning.
Midlands Live: Water back on at JLR and Cadbury; More burst pipes mean bottled water still being supplied Michelle Hickinbottom, from West Heath, said her house had had intermittent water from Sunday evening, with no water to upstairs taps or toilets.
She tried to stop at Sainsbury’s to get some water on the way to the gym, but said the traffic was "crazy", so she went to buy water in Rubery instead.
‘Good natured’ "And actually, when we got to Rubery, there was a pallet full of water and by the time we had gone round there was only three cases left."
She said a friend had also waited an hour-and-a-half in traffic to try to get to the supermarket on Monday afternoon.
Severn Trent said water had been returned to Birmingham, but it expected poor pressure or intermittent supplies in south Birmingham again on Tuesday.
It will still have bottled water stations at Sainsbury’s, in Frankley Beeches Road, and also at Tesco, in Stratford Road, Solihull.
Ria Gaffney, from Severn Trent, said: "There were some queues last night when people came out to pick up supplies after work but it was all very good natured."

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Why do water main pipes burst?
About 1,500 homes in Wales are still without water because of problems caused by burst pipes after Storm Emma.
Welsh Water said it was still trying to fix problems in Gwynedd, Pembrokeshire and on Anglesey.
Some customers are also still without supplies in Merthyr Tydfil, Brecon, Rhondda, Gwaelod y Garth and Carmarthen.
Welsh Water has apologised.
Thousands without water for a third day In pictures: UK battles snow Shoppers post photos of empty shelves Wales thaws as temperatures rise Anglesey councillor Carwyn Jones told BBC Radio Wales’s Good Morning Wales programme that residents in Llangoed had been without water since Friday without alternative supplies.
It’s not acceptable, these are customers and they are being let down badly."
Mr Skates said the village did receive a bottled water delivery on Monday night from Welsh Water but the firm still could not tell them when supplies would be restored.

(2) View gallery BOTTLED water for residents left without supply in north Pembrokeshire have arrived.
A delivery of water bottles was expected on Monday night, with Pembrokeshire County Council stepping in to help distribution, but the Dwr Cymru Welsh Water lorry failed to arrive.
Hundreds of residents in Croesgoch, St Davids, Mathry, Trefin and surrounding areas have been hit by problems with supply as Dwr Cymru Welsh Water faces problems with pipes across the UK.
Llanrhian county councillor Neil Prior said: “Thanks to everyone who turned out tonight to help with the water distribution, unfortunately Dwr Cymru’s lorry didn’t make it past Swansea!!!
But we will try again!
“Thank you to everyone who turned up tonight, thanks to everyone who helped spread the word, and thanks also to PCC staff who were ready and waiting in the depot and will be there first thing in the morning to help Dwr Cymru provide us with water.” Cllr Prior uploaded pictures of the delivery arriving in Croesgoch this morning which would be shared with Porthgain and Trefin.
He added that another delivery was expected and he encouraged anyone affected to come along.

Thousands of homes in Devon are left without water this morning after sever weather has led to burst water mains across the county.
South West Water said their staff are working around the clock to maintain essential services to customers following an unprecedented number of burst water mains following the severest weather in the region for many years.
Bursts are currently affecting customers in the Exwick region of Exeter where customers may be experiencing interruptions to their water supplies.
Three schools are closed because of the issue.
Route 39 Academy in Clovelly, Silverton Church of England Primary School and Exwick Heights School in Exeter are all closed due to no supply.
Exwick Heights school has confirmed it is closed until lunchtime due to the issue.
Jo Ecroyd, South West Water’s Customer Services Director, said: “We would like to apologise to our customers, thank them for their patience and reassure them that we are doing everything we can in this difficult situation”.
“Whilst South West Water engineers deal with the burst bottled water will be made available from 0600am at the following locations and supplies will be delivered to vulnerable customers” Costcutter, Kinnerton Way, EX4 2PR Outside 249 Farm Hill EX4 2ND Kinnerton Way, Farm Hill Entrance EX4 2LR Winchester Avenue (Nr Tescos) EX4 2DQ Costcutter, Isleworth Road EX4 1QT Outside 48 Gloucester Road EX4 2EF Entrance to Poppy Close EX4 2NZ “Again we would like to thank all of our customers for their patience we are working as fast as we can to return to normal service.” “We would also ask customers that do have water to save some until normal service resumes and check that their garden taps are turned off and not using water.
Updates will be made available on the South West Water website and social media as soon as they become available.
Western Power Distribution has also reported power outages in the Higher Exwick Hill and Moorland Way areas of Exwick, as well as Rosebarn Avenue off Pensylvania Road.

As many as 5,000 households across Sittingbourne have been without water for more than 24 hours, Southern Water has confirmed.
Despite the water company assuring its customers that the network is refilling, some people have been without running water for hours.
Sittingbourne Cllr Mike Whiting said he received this response from Southern Water when he emailed them personally: "We have inspectors in the local area arranging for the delivery of bottled water to elderly and vulnerable customers.
A burst main also caused water chaos across Crowborough and East Sussex yesterday and some parts of Ashford (March 4).
See our live blog for the latest as we follow Southern Water’s updates If you are able to update us, call 01303 851655 or email victoria.chessum@kentlive.news.
We apologise to our customers in Sittingbourne who are still without water.
Thanks for your patience while we work hard to fix the issues and please keep checking our online pages for updates.
To all our customers in the #Sittingbourne #Kent area.
The network is refilling and re – pressurising, your water supply might be at a low pressure to start with.
We apologise to any customers in the Sittingbourne, Kent area who may have had a loss of supply or low water pressure.

Residents in Crowborough are angry their town has so far missed out on a delivery of bottled water after multiple main pipes burst.
Thousands of people across East Sussex have been without water or low pressure supply since yesterday (Saturday) morning.
Towns and villages include Frant, Wadhurst, Rotherfield and Lenham in Kent.
But while Wadhurst has received its delivery of water bottles which were given out at the Grey Hound Inn and in Rotherfield locals saw their lorry load finally arrive at lunchtime after waiting at the village hall from 9am, Crowborough has so far been missed out.
South East Water said it had more than 100 of its "best" people working across the region to restore supply.
But in Crowborough, tempers are fraying and patience is running out.
And tempers are not the only thing running out in Crowborough – locals are reporting the supermarkets have sold out of bottled water.
Steve Andrews, South East Water’s Head of Central Operations: “We would like to apologise to our customers from right across our region of parts of Kent, Sussex, Surrey, Hampshire and Berkshire who are without water or have low pressure and reassure them that we are working around the clock to resolve the issue.
“At this stage we are not able to say when supplies will be back to normal as we are trying to locate what we believe to be a very large number of very small bursts right across our network.
We are dealing with multiple leaks in cities, towns and villages so when we repair a pipe there are others still causing issues and water is not returning.” Kent Live has approached South East Water for comment.

An urgent mission is under way on Saturday evening to restore water supplies to a Gloucestershire town where the supply has run dry.
Severn Trent Water has apologised to customers in the Winchcombe who have "little or no water" tonight.
The company has said it is going to take some time to restore problems and a supply of bottled water is being delivered to around 30 vulnerable residents.
It said: "We believe the problem may be caused by airlocks in the pipes coming out of the service reservoir that supplies the area so we’re working to clear that, in the same way that you might bleed a radiator when it gets in it (only much, much bigger).
"While we do that, we have eight 18,000 litre tankers and two 9,000 litre tankers moving into the area but we’re not certain that our injection points, which allow us to pump water directly into our pipes, are accessible.
"For example, we had to search for one of our hydrants to open a valve and found that it was under four feet of snow."
Police say around 3,000 people are affected.
On Friday, a burst water pipe left dozens of homes in Winchcombe without water.
Households in an around Hailes Street are into their second day without mains water and Severn Trent engineers had to leave the repair job early yesterday as the freezing weather worsened.
Updates below

The reservoirs have filled sufficiently to allow supply to return however, due to increased demand restrictions will be in place again tonight and for the next few nights until demand regularises and the water treatment plant can meet the demand needs.
It may take several hours for all sections of the network to get water supply.
Customers are being asked to conserve water to avoid reservoirs emptying and water pressure to homes and businesses being affected.
Night time restrictions on the Tully and Letterfrack supplies has enabled the reservoirs to refill to some degree and full supply has been restored this morning.
Irish Water would like to thank customers supplied by these schemes for adhering to our water conservation notice yesterday.
A repair crew travelled to the island this morning (Saturday) to carry out repairs.
Customers on the island are urged to conserve water.
Bottled water is available at Inishbofin pier from 12.30pm.
Williamstown is suffering a major water supply issue and leak repair crews will be undertaking work in the town today to try to restore supply.
The following areas are experiencing low pressure and/or loss of supply due to an increase in demand and some issues at treatment plants: Kilkerrin/Moylough, Mountbellew, Dunmore/Glenamaddy, Ahascragh, Williamstown and Tuam.