A record number of homeless alerts have been sent to a major charity as temperatures plummeted and snow blanketed most of the country.More than 3,600 alerts were sent to the app StreetLink, which connects the homeless to local services, between Monday and Tuesday morning – the highest total ever for a 24-hour period.This app allows concerned pedestrians to alert local authorities about people sleeping rough in the cold weather.Councils have responded to the cold weather by providing extra beds, in order to ensure no one has to sleep outside in the snow, as the Met Office issued a “danger to life” red alert to parts of Scotland and the south west.Around 500 extra beds in shelters, hostels and churches have been made available in the capital through local authorities, charities, faith and community groups after a Swep (Severe Weather Emergency Protocol) plan was triggered.In response to the bitter conditions, St Mungo’s homeless charity and the City of London have opened a new emergency shelter – in the Guild Church of Saint Mary Aldermary – which took in seven people on its first night.St Mungo’s has said London is experiencing its most prolonged period of freezing conditions for seven years, which could prove deadly for people sleeping outside. I’m making sure nobody has to sleep out in the cold. My team here at City Hall are working hard with charities and councils to make sure emergency shelters are open across London and everyone can be cared for properly. One way you can help is by donating: https://t.co/hLm3VLzYXR— Mayor of London (@MayorofLondon) February 28, 2018 She said: “The whole point of this is, yes, let’s get people in and out of the dangerous weather conditions, but actually once we’ve got that opportunity, let’s try and keep them in.”How you can help if you see a rough sleeper in this cold weatherCouncils across the country have implemented Severe Weather Emergency Protocols for rough sleepers, meaning if passers-by report concerns to their local authority, they will send someone from the Rough Sleeper Team down to help.Check with the local council for their individual contact details, or speak to Streetlink. This is also activated across London, meaning Local Authorities have a duty to offer emergency shelter to anyone rough sleeping. Asked how he had managed the cold, he said: “I’ve been walking around, but I find that I’ve got blisters on the bottom of my feet. I’ve been limping the past few days, it’s not been good at all.”I just want to get back on track.”Petra Salva, director of rough sleeper services, told PA that deaths on the streets over the bitterly cold snap were “a horrific possibility”.She said: “If we don’t act, then people could die and … we don’t know yet what the consequences of this prolonged cold weather has been.”She said her mouth had “dropped open” after she walked into the church and saw a homeless person her team have been working with for four years, who, until now, had not accepted offers of a bed inside. She said: “If tonight, he was the only one who came in, it would make it worthwhile.”But, she added, she was not comfortable with the idea that the doors would simply close on people as the emergency provisions end with the return of warmer weather. He was taken to a shelter, and told the Press Association he was “very, very grateful”, adding that he had felt “cold but relieved that someone was there, that someone actually cared”, when the St Mungo’s workers approached him. Credit:Brais G. Rouco / Barcroft Images If you see rough sleepers out in the snow during daytime hours, please remember that you can use our app to locate the nearest day centre so that the individual can get into the warm, and get some food and advice on how to end their homelessness. https://t.co/rlxzLP2NvS— Street_Link (@Tell_StreetLink) March 1, 2018 One homeless man, Sam, was found by the charity just before midnight on Wednesday in a London underpass, with no sleeping bag, set to sleep in just the clothes he was wearing. Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings. Streetlink has asked concerned pedestrians to report the time, place and appearance of anyone sleeping rough in these temperatures.A volunteer will then seek out the rough sleeper and offer them a warm bed for the night.Either download their app or contact them online using the link above, or call their 24-hour hotline on 0300 500 0914.