Berlin, Germany (BBN)-Some 40,000 migrants could arrive in Germany over the next two days, officials say – double the number who entered the country last weekend.
Most are expected to arrive in the southern city of Munich but there are concerns about whether the region can cope with another large influx, reports BBC.
About 4,000 troops are being deployed in Germany for logistical support.
Germany has become an attractive destination for Syrian refugees since it waved EU rules on dealing with them.
The government announced in August that it would deal with Syrian asylum applications regardless of where the migrants first arrived in the European Union.
Tens of thousands of mainly Syrian migrants have been making their way from Turkey, through the Balkans and Hungary to reach Germany, Austria and Sweden.
Migrants have continued to arrive in Macedonia from Greece, and more buses were reported to be making their way towards the Hungarian border this weekend.

Many migrants received a warm welcome at Munich rail station last weekend, and thousands have continued to arrive in Germany throughout the week.
The mayor of Munich, Dieter Reiter, has made an urgent call for other German regions to do more to process and accommodate the new arrivals.
He described as “scandalous” the failure of other regions to provide more accommodation, according to state broadcaster, ARD.
Reports suggest the government is considering new temporary powers to take control of unoccupied rental property so it can accommodate migrants.
A large processing hub is planned for northern Germany on the Luneburg Heath in Lower Saxony. Trains would take migrants there directly from Austria.
Meanwhile, protests in support of migrants are expected across Europe later on Saturday.

Ten of thousands of people are due to participate in a “day of action” with dozens of events taking place in several countries.
A handful of rival anti-migrant protests are also due to take place.
Hungarian Prime Minister Viktor Orban has called on the European Union to give Syria’s neighbours €3bn (£2.2bn; $3.4bn) in financial aid to help those displaced by the civil war.
Mr Orban said supporting Turkey, Lebanon and Jordan with such a package would end the mass migration to Europe.
In an interview with Germany’s Bild newspaper (in German), Mr Orban said the €3bn fund could be raised by every EU country paying an extra 1% into the budget – or by a general reduction of EU spending by 1%.
“We have a plan, which I will submit to the EU at our next meeting,” he said. “It means that we support the neighbouring countries of Syria with massive financial aid.”
He said migrants from Lebanon, Jordan and Turkey should “return to where they came from”, before adding: “These people do not flee from danger.”

Hungary has struggled to cope with some 150,000 migrants that have crossed its borders so far this year and from next week, people who enter the country illegally will be arrested.
There have been tensions between authorities and migrants across Hungary, as thousands try to pass through en route from Greece to countries in northern and western Europe.
In the past few days, aid workers have spoken of “abysmal” conditions for refugees at a camp in Roszke on the Hungarian-Serbian border.
Hungary has insisted it is trying to fulfil its obligations as an EU member and register all new arrivals.
But its attempts to control the flow of migrants – such as building a fence along its border with Serbia and staging border protection exercises – have proved controversial.