War in Ukraine has meant massive displacement for the nation’s people. Their need – and Russia’s threat to Ukraine’s territorial sovereignty – has also sparked a massive global response of aid and support.

What’s remarkable is the combination of scale and speed. Ukraine may lag behind Syria as a source of refugees in recent years, yet the crisis in Ukraine has caused about 1 in 4 Ukrainians to leave their homes – and in the space of just a few weeks.

Some $1 billion in private charitable donations for Ukraine doesn’t yet outweigh donations that helped victims of Hurricane Katrina. But philanthropic pledges are growing about as fast as aid did for Louisianians after Katrina. Military and humanitarian assistance from nation states pushes the total much higher still.

Our graphics (below) depict how Russia’s invasion has affected many of Ukraine’s most populous areas. One key question now is how to get the targeted relief to where it’s needed.

“In the current crisis, national and international humanitarian groups have limited or no access to areas under attack,” a recent report by the U.S. Congressional Research Service says. 

Another major challenge: Helping front-line nations like Poland that have been flooded with people fleeing Ukraine. The European Union has adopted a measure providing temporary protection to persons fleeing Ukraine and is channeling aid to affected neighboring countries as well as to Ukraine itself.