In the Blackburn borough with Darwen, home visits were reduced to one household plus two members from another household.
Officials say the infections are spreading rapidly among ethnic minority communities living in large families.
Director of Public Health, Professor Dominic Harrison, said, “These steps will help and we call on all Blackburn residents with Darwen to follow them to protect themselves and their loved ones.
“If we don’t do it, a local foreclosure, like in Leicester, becomes a very real possibility. ”
He added: “We know that they are mainly in the regions of South Asia and that they are in areas with a high number of terraced houses with a high number of occupants in the house, so four five or more people in the household. ”
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He said 85% of the 114 new cases were people of South Asian descent.
Other foreclosure measures would be introduced if cases did not decline before July 27.
Council chief Mohammed Khan said: “Life cannot go back to normal for now, and we must all make sacrifices to avoid a local foreclosure.
“Please continue to do your part to respect the rules for protecting yourself and your family.”
He intervenes while the government is about to take a decision soon on the advisability of prolonging the foreclosure of the agglomeration of Leicester.
There, the rate fell from 115 per 100,000 population to 118 in the week ending Saturday. But that figure went from 152.2 in seven days to June 27.
Pendle also advised residents to “limit large reunions of extended families indoors” after recording the second highest number of cases in the country, at 76.6 per 100,000.
He saw a dramatic increase, particularly in the Nelson and Brierfield areas, in the week through Saturday from 14.2 per 100,000.
It also has a large population of ethnic minorities.
Lancashire Director of Public Health Dr Sakthi Karunanithi said, “We need your help now to … keep Pendle out of solitary confinement. ”
Rochdale, Bradford, Peterborough and Luton are other cities with high infection rates.
Tighter measures to control the virus have been introduced in Blackburn and Darwen in Lancashire, after 61 new cases in the past week.
The number of confirmed cases in the Blackburn with Darwen area increased to 47 per 100,000. This is an increase of 31.6 cases over the seven days to July 4.
The local authority of 148,000 people called on people to bump their elbows in place of handshakes and hugs.
Residents are asked to wear cloth face covers in all enclosed public spaces, including workplaces, libraries, museums, health centers, and hair and beauty salons.
Professor Harrison said, “We have what we call a rising tide event rather than an epidemic.
“By this we mean that we have a number of increasing cases in specific areas of a large community, but not a single large epidemic like other areas that have experienced an epidemic in the workplace.
“And when we look at the data, we can see clusters in one part of the city, but the clusters are household clusters.”
Large families caring for elderly parents may be a factor in the epidemics, but authorities have warned of the stigmatization of certain ethnic groups.
About a third of Blackburn, with 148,000 residents of Darwen, is of ethnic origin, with a large population of Pakistani origin.
Blackburn Councilor Saima Afzal said, “It should worry everyone if a community is stigmatized and we know the facts are there, we are open to those facts.”
“You come home and take care of a family member, or three or four families live under the same household, for economic or financial reasons.
“The Asian community does it, they pool their resources to help the whole family survive.
“If then they go home, they pass it on to more than one person.”
Figures from the last census show that 25% of Bangladeshi households in the district have too few rooms, compared to 5% of white households.
Blackburn adviser Shaukat Hussain said, “These are the terraced houses.
“Other neighborhoods are well distributed, while some central neighborhoods are more terraced houses, more people in the household, more families, so all of that will probably play out.”
Mobile test units have been brought to at-risk cities.
Government officials will meet with officials in Leicester today (Thursday) to discuss the possibility of lifting the foreclosure.
Health Secretary Matt Hancock said, “At Blackburn, I think the board does a fantastic job.
“There is a higher Covid rate in Blackburn than the average across the country, it is not as high as in Leicester. We came in and supported them, by working with them, for example, by putting in a lot more tests. And then they took these steps locally and I applaud that.
“This is exactly the kind of local action we want to see.”