May will deliver a speech at a Conservative Party conference underway in Manchester.
"When immigration is too high, when the pace of change is too fast, it's impossible to build a cohesive society," The Guardian reported that May is expected to say, after receiving a text of the speech.
May is expected to add that the country’s core housing and transport infrastructure will be unable to cope with a large influx of migrants.
Citing reports by the House of Lords economic committee and Organization for Economic Cooperation and Development (OECD), the speech is reported to state that while benefits of selective immigration are high, the positive effects of hundreds of thousands immigrants are questionable.
The United Kingdom, along with other EU member states, is currently struggling to manage the largest migrant crisis since World War II, as hundreds of thousands of refugees flee conflict-torn Middle East and North Africa, trying to reach the European Union.
According to the European Commission, some 500,000 migrants and refugees have arrived in the bloc this year. Prime Minister David Cameron said that the UK would accept 20,000 migrants under its own plan, separate from the EU quota scheme of migrant distribution.
