Police said Noah was at the playground in Merriam Close, Brantham, Suffolk, at 3pm on Tuesday and is reported to have run off down an alleyway nearby towards a new-build housing estate.
He is described as white, with curly ginger hair and wearing a white Bluey T-shirt, shorts and white trainers.
On Tuesday night, Suffolk Police confirmed the three-year-old is non-verbal, has partial hearing loss and has been undergoing an assessment for autism.
Residents in the area have been asked to check their gardens, sheds and outbuildings.
The force added that efforts to locate Noah were continuing through the night and an appeal to the public was being renewed.
Emergency services are conducting the search, with the coastguard among the agencies taking part.
HM Coastguard said in a statement: "HM Coastguard assisted Suffolk Constabulary with an incident at Brantham by sending an HM Coastguard helicopter and Coastguard Rescue Teams from Felixstowe and Holbrook."
Brantham Leisure Centre urged people living nearby to carry out checks, saying on Facebook: "We have no updates confirming the safe return of Noah. We urge you all to check your gardens, neighbours gardens and behind bins/cars."
James Cartlidge, the Tory MP for South Suffolk, said it was "incredibly concerning" to hear about Noah.
In a post on social media, he urged anyone with information to contact the police and added: "I simply can't imagine what his family and loved ones are going through, but they will be in the thoughts of us all."
The victims on board the NewsChopper 4 helicopter were identified by NBC Los Angeles as Eliana Moreno, an aerial photojournalist, and pilot George Marciniw.
The other person killed was in the car park where the aircraft crashed, Captain Branden Silverman, a spokesman for the LA Fire Department, told reporters during a news conference.
Two people were taken to a hospital, said Rico A. Gross, a fire department battalion chief. No detail about their conditions was released.
Capt Silverman said the incident occurred just before 7pm local time (3am UK time) on the 9100-block of North Mason Avenue in Chatsworth.
The helicopter crashed into a car park near a storage building, causing a fire to break out, the fire department said.
At least four cars and two storage containers burned after the aircraft caught fire, which was quickly put out, according to officials. The cause of the crash is not yet known.
One person killed in the crash was outside in the car park, next to the commercial building, Capt Silverman told reporters.
The incident occurred after an earlier crash on Nordhoff Street - about a mile-and-a-half (1.6km) away - at 5.03pm local time involving an SUV and a bus in which two people were killed and six others were injured.
The helicopter was one of many aircraft covering the crash, NBC Los Angeles reported earlier.
"We knew it was a news chopper, we knew we'd lost contact with our people out there, and we've just received the confirmation that, in fact, NewsChopper 4 went down just before 7 o'clock tonight in Chatsworth," anchor Colleen Williams said.
"We're going to take a couple of minutes to think about that, to process and to regroup," Ms Williams added, her voice at times shaking with emotion.
The aircraft was operated by Angel City Air, an aerial production company, and affiliated with the station, which said earlier on the air that it had lost contact with those on board.
Ms Moreno joined the company's helicopter team in 2010 after graduating, NBC Los Angeles reported.
More than 70 firefighters responded to the helicopter crash, according to the fire department.
Capt Silverman described the helicopter as "pretty well destroyed" and said emergency teams were going to have to search through the rubble to determine how many victims were on board.
The National Transportation Safety Board will lead the investigation into the cause of the incident.
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Los Angeles mayor Karen Bass said she was "absolutely devastated by the loss of life", adding that "my heart is with the families and loved ones of those we lost in the tragic bus collision and helicopter crash".
Ms Bass paid tribute to the emergency teams who "responded so quickly" and urged the public to stay away from the area while officials remained on the scene.
Governor Gavin Newsom thanked the emergency crews responding to both incidents and said in a post on X that "our hearts are with the victims and families".
Wandsworth Council is set to increase council tax for a Band D property by £958 - a 94% rise - from April 2027, in response to what it describes as the "financial pressure" of government reforms.
The south London borough previously had one of the lowest council tax rates in Britain. However, following the publication of what it calls a "comprehensive" spending review, the Conservative administration says the government's Fair Funding reforms will reduce Wandsworth's funding by £84m a year.
Check how much your council tax is set to rise
The authority claims the reduction is equivalent to its combined total annual spend on parks, libraries, leisure centres, bin collection and street cleaning.
It says that new spending reforms will place "significant additional pressure on essential local services and means the council must make tough choices".
'Savage cuts'
Council leader Robert Morritt, who took over the role in July, admitted that increasing council tax was not a decision he "ever wanted us to have to make", but said the announcement was being made now to ensure "local people have the maximum amount of time to adjust".
He blamed the increase on "savage cuts from central government" and "a dramatic reduction" in the council's level of reserves.
Commenting on the outcomes of the spending review, Mr Morritt said the council was "setting out a clear plan to protect the services residents rely on while tackling the financial challenges facing the council".
He said that "difficult decisions" had been taken in a bid to help ensure that services "remain sustainable into the future".
Mr Morritt added: "There are difficult choices in this report, but there are also clear priorities: cleaner streets, safer communities, stronger housing services, support for vulnerable residents and action to put the council back on a sustainable financial footing."
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Peter Graham, deputy leader of Wandsworth Council and cabinet member for finance, said: "We promised that we'd be honest with residents.
"Council tax will need to rise unless government thinks again. And it must think again.
"We do not want to do this, and we do not take this decision lightly, but the scale of the financial pressure facing Wandsworth means additional income is now needed to protect the services people rely on."
Mr Graham insisted that the council was "fighting" for a "fairer deal", and that Wandsworth should not be "punished" for "running efficient services and keeping council tax low".
He added: "Our message to residents is clear: we are on your side, we are making your case, and we will keep fighting for the funding Wandsworth deserves."
Charity Carers UK estimates that more than 1,500 workers are becoming unpaid carers, in what it describes as a "deeply worrying" situation.
Its latest survey found that 6% of respondents said they had left their job to care for a family member or friend who is older, disabled or seriously ill, while one in five workers were having to balance work alongside being an unpaid carer - up from 15% in 2019.
Of those who had quit their jobs completely, a third - 34% - had done so in the previous two years, compared with 18% in 2019.
One in five UK adults providing unpaid care equates to an estimated 11 million people, Carers UK said, while the proportion leaving work to care equates to an estimated 3.33 million people, with more than one million doing so in the past two years.
The charity said this equates to more than 1,500 people a day - up from around 600 a day in 2019.
"The direction of travel is clear," the charity's report said.
"The pressures facing unpaid carers have intensified significantly in recent years, with more people reaching a point where balancing work and care is no longer sustainable."
Findings 'should concern us all'
Emily Holzhausen, director of policy and public affairs at Carers UK, said the numbers were "deeply worrying", citing the Department for Business and Trade which estimates the economic cost of carers leaving paid work to be £37bn a year.
Ms Holzhausen added: "The sizeable impact of caring responsibilities on peoples' working lives should concern us all, because when people are forced to leave work to care employers lose valuable skills and there are wider implications."
Prime Minister Andy Burnham has previously stated that caring for a loved one without adequate support can and does "break people".
Speaking in July, Mr Burnham, whose father died on Monday after suffering from Alzheimer's, said he could "certainly attest from family experience that it's too hard for the family carers" and that the issue "needs to be recognised".
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In June, a government consultation was launched with a proposal to introduce paid carer's leave, as well as new guidance for workers and employers on protections carers have in the workplace.
A legal entitlement to unpaid leave for carers came into effect for England, Wales and Scotland in April 2024, giving employees who are carers for a dependant an entitlement of up to a week of unpaid leave every 12 months.
Sterling, 31, also admitted to possessing six canisters of the class C drug, nitrous oxide, and failing to provide a specimen to police.
He crashed the Lamborghini Urus SUV on the M3 southbound, close to the Minley Interchange in Hampshire, on 28 May.
Police said no other vehicles were involved and there were no injuries.
Sterling appeared at Basingstoke Magistrates' Court and admitted dangerous driving on the M25, the M3, the A327 and Minley Road prior to the crash.
He appeared in court wearing a black suit jacket, black trousers, black shoes and a dark top.
Sterling played for Liverpool before switching to Manchester City in 2015, where he won four Premier League titles and helped the club break the league's points record.
He transferred to Chelsea in 2022 and was loaned to Arsenal in 2024. However, his Stamford Bridge contract was terminated in January.
After a brief stint with Dutch club Feyenoord, he's now without a club.
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Sterling was also a mainstay of the England team under Gareth Southgate, scoring 20 goals across 82 appearances, as well as playing in three World Cups and two Euros tournaments.