As the Russian invasion of Ukraine continues past the two-week mark, the number of civilians who are fleeing is increasing.

Since Feb. 24, 2022, more than 2.5 million refugees have fled Ukraine, according to the United Nations High Commissioner for Refugees (UNHCR), the UN Refuge Agency, which is headquartered in Geneva.   

RUSSIA INVADES UKRAINE: LIVE UPDATES

More than a million of those refugees are children, many of whom are unaccompanied, UNICEF said on Thursday.

"The number of children on the move is staggering, an indication of how desperate the situation for children and families in Ukraine has become," UNICEF Regional Director for Europe and Central Asia Afshan Khan said this week in a statement. 

Ukraine

Refugees from Ukraine are shown on the move in this image. (Francesco Malavolta)

"Children are leaving everything they know behind in search of safety. This is heartbreaking." 

A joint statement by UNICEF and UNHCR’s Filippo Grandi indicated this week that "children without parental care are at heightened risk of violence, abuse and exploitation." 

CHICAGO MOM FLIES TO UKRAINE-POLAND BORDER TO HELP REFUGEES

"When these children are moved across borders, the risks are multiplied. The risk of trafficking also soars in emergencies," the joint statement also said.

Scores of people have left their homes with literally nothing but a few pieces of clothing and whatever else they could carry on their backs or in their arms.

Ukraine

This image, taken by Francesco Malavolta, shows members of a Ukrainian family — including young children — making a perilous journey out of their country as they flee the Russian invasion of their land. (Francesco Malavolta)

Francesco Malavolta, a photojournalist who has been at the Ukraine-Poland border and in other border areas there, told Fox News Digital this week, "The people are very tired because the journey [out of Ukraine to other countries] lasts 3 or 4 days for them."

T.D. JAKES, OTHER FAITH LEADERS WEIGH IN ON UKRAINE'S FIGHT AGAINST RUSSIA 

He also said, "There is a strong feeling of concern for their loved ones left behind in Ukraine — many to fight — but not [feelings] of resignation," he emphasized. 

He said many people leaving Ukraine "hope to return" to their country one day, or as soon as they can.

Ukraine Cars night air raid in the village of Bushiv

Gutted cars following a night air raid in the village of Bushiv, 40 kilometers west of Kyiv, Ukraine, are shown on Friday, March 4, 2022, in this image.  (AP Photo/Efrem Lukatsky)

Here's a closer look at more numbers associated with Ukraine as this tragedy continues to play out.

Total area

In terms of total area, Ukraine roughly parallels the state of Texas. 

Ukraine is about 233,031 square miles, while Texas is about 268,596 square miles.

Ukraine

Natali Sevriukova reacts as she stands near her house following a rocket attack on Kyiv, Ukraine, on Feb. 25, 2022. (AP Photo/Emilio Morenatti)  (AP)

Economy

Ukraine’s GDP is about $155.5 billion, according to 2020 estimates by The World Bank. 

Gross domestic product (GDP) is an estimate of the total value of goods and services produced by a given country and a given year. 

The GDP of the United States is around $20.89 trillion.

This map of Ukraine shows its capital Kyiv and its boundary with Russia.

This map of Ukraine shows its capital Kyiv and its boundary with Russia. (Fox News)

Total population

The population of Ukraine is similar to the population of California. 

World Population Review estimates that Ukraine’s population is roughly 43.2 million people. The population of California, according to July 2021 estimates from Census.gov, is about 39.2 million.

Ukraine flag

The Ukraine flag is shown here in this file image. (iStock)

City populations

Kyiv’s population — 2.79 million people — roughly mirrors that of Chicago (2.67 million).  

Kharkiv's population — 1.43 million people — is roughly that of San Diego (1.42 million).

Lviv's population — 717,803 — is roughly that of Washington, D.C. (718,355). 

Mariupol (481,626) has roughly the same population as Omaha, Nebraska (480,871). 

Kherson (320,477) has roughly the same population as Lexington, Kentucky (325,330).

CLICK HERE TO GET THE FOX NEWS APP

City populations shown above are 2022 estimates drawn from World Population Review.