These maps explain why Putin invades Ukraine 2:47
(CNN Spanish) --
After a week of war in Ukraine after the invasion of Russian forces, the siege of several cities continues while a social refugee emergency is unleashed and civilian deaths are counted in the thousands, according to the Emergency Service from Ukraine.
Different maps show the effect of the Russian onslaught.
The city of Mariupol is besieged, isolated.
As the invasion enters its second week, President Zelensky pleads for more international assistance and another round of Ukraine-Russia talks take place.
The International Criminal Court said it would launch an investigation following Russia's invasion of Ukraine.
One million refugees have fled Ukraine in just one week, according to the UN.
New satellite images show the destruction caused by Russian military strikes in areas north of Kyiv.
One week after the Russian invasion of Ukraine.
This is what you should know
The map of the territory of Ukraine occupied by Russia
A picture of Russia's military intentions is becoming clearer: around Kyiv its forces are focused on encircling the Ukrainian capital, in an apparent attempt to overthrow the government, a goal that President Vladimir Putin, in brazen and false terms, called "denazification".
And a sort of crescent of Russian-controlled territory is emerging in the east and south of the country.
On Wednesday morning, Russia claimed its troops had taken full control of the southern city of Kherson, north of the Crimean peninsula, something Ukraine's Defense Ministry disputed.
Hours later, the mayor claimed that the Ukrainian forces were no longer in the city.
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But the push north from Crimea has expanded a zone of Russian control that was established in 2014, when Russia occupied and annexed the Black Sea peninsula.
It also restored Crimea's water supply, as Russian forces reopened a canal that supplied up to 85% of the peninsula's needs before it was cut off following annexation.
More importantly, the advance in the area shows the beginning of a potential land bridge that could, in theory, link the Ukrainian port city of Odessa, via Kherson, with separatist-controlled territories to the east.
A key part of that potential corridor is the southeastern city of Mariupol.
Heavy fighting continues there, with Russian and Russian-backed separatist forces surrounding the city of some 400,000 people on three sides.
Russia insists that it is not aiming to attack Ukraine's residential neighborhoods, despite overwhelming evidence to the contrary.
Refugees
The number of refugees who have fled from Ukraine to neighboring countries amounted to one million people as of March 1, according to the UN Refugee Agency (UNHCR).
Hundreds of thousands of people have desperately headed west to central Europe due to the Russian invasion of Ukraine that began on Thursday, February 24.
The UNHCR said on Tuesday that the situation in Ukraine could become "Europe's biggest refugee crisis this century," adding that it "is mobilizing resources to respond as quickly and effectively as possible."
Visa status for Ukrainian passport holders
The map of Eastern Europe shows an increase in road traffic along the western border of Ukraine.
Amid Russia's invasion, Ukrainians seek refuge in neighboring nations.
Moldova, Belarus, and Georgia do not require a visa for Ukrainian passport holders, and many other countries in the region do not require a visa for at least 30 days.
The map shows the increase in road traffic, represented by orange circles.
The map of airspace in Ukraine and Europe
The European Union has closed all airspace in its 27 countries to Russian planes after a steady stream of announcements of member nation airspace closures over the weekend.
In response to the EU ban, the Russian Civil Aviation Authority announced on Monday that it has closed its airspace to airlines from 36 countries.
The list also includes the UK and Canada, which have banned Russian planes.
On Tuesday, President Joe Biden announced that the United States is following suit and will ban Russian aircraft from US airspace.
Switzerland also closed its airspace to Russia, and Russia responded with a ban on aircraft from Switzerland.
Last week, Ukraine's airspace was closed in the wake of the Russian invasion.
Ukraine's neighbor Moldova also closed its airspace, as did parts of Belarus.
The conflict could redraw the world aerial map.
With reporting from CNN's Helen Regan, Paul P. Murphy, Jason Kurtz, Tim Lister, Nathan Hodge, Francesca Street and Marnie Hunter
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