Officers have responded to several hundred unlicensed music events in London and across the country in recent months amid warm weather and an easing of lockdown restrictions.
And Boris Johnson said that new fines were to be introduced for those hosting raves when he announced a further easing of England’s lockdown last week.
People facilitating or organising any unlawful gathering of 30 people, including illegal raves and other unlicensed music events may be hit with a £10,000 fine.
Other participants can continue to be issued with fines of £100, while people who have already been fined will see the amount double on each offence, up to a maximum of £3,200.
The moves come on another busy weekend for police in regard to unlawful gatherings.
Birmingham Police said they attended more than 70 unlicensed street and house parties on Saturday night, while police in Huddersfield broke up an illegal rave involving some 300 people.
The Metropolitan Police received information on more than 200 events across London in a single weekend, responding to more than 1,000 illegal events in the capital since the end of June.
Elsewhere, West Midlands Police shut down 125 parties and raves – including one of up to 600 people – in one weekend.
Home Secretary Priti Patel said: “These gatherings are dangerous and those who organise them show a blatant disregard for the safety of others.
“I am pleased the police have already stepped up their response and I am giving them the tools they need to continue to keep us safe.
“We will continue to crack down on the small minority who think they are above the law.”
Fines for not wearing face coverings where it is mandated are also set to double for repeat offenders from Friday, starting at £100 and doubling to a maximum of £3,200 for each repeat offence.
The National Police Chiefs’ Council has warned that forces in England and Wales will continue to increase patrols heading into the bank holiday weekend.
Areas of concern, such as Leicester and Greater Manchester, have seen deployments larger than on New Year’s Eve, it said.
Commander Ade Adelekan, lead for unlicensed music events, said: “These events are hosted without regard for the safety of those attending, and police have observed cases of anti-social behaviour, sales of drugs and gang activity.
“To the organisers of this sort of activity, I strongly advise that you seriously consider the risks you’re creating for everyone in attendance and the wider community.
“There is a risk of prosecution for those who organise these events and equipment will be seized.”
With additional reporting by PA