Begin repairing roads and clear debris in the Sonodine River.
If possible ask for aid from other empires. (Food, labor aid, etc)
The Serisian Navy transports relief supplies marked for Sonodine to Arcon from Point Ardrov.
Arcon receives the supplies at Oydvyn, and in both receiving the supplies and wishing to aid of its own volition, sends the combined relief upriver. The supplies land in Sonodine City.
Also just looked up early steam locomotives. I mean look at this li'l guy from 1829!

Avalonia invites locals in this area to join the Union following a steady stream of reports that they have been friendly and welcoming of Avalonian prospectors and settlers who migrated there during the period of Avalonian emigration, and of Avalonian scouting groups sent during the WDC-Conservatia-Romek War to give advance warning of any incoming armies. Avalonia points out that this will allow the locals to continue their lives within the sphere of a nation that values individual freedom, rather than eventual inclusion into highly expansionist and autocratic nations to the South.
The locals agree to join in the Avalonian Union, so long as their culture isn't infringed upon.
didnt the new romekate government enforce a new denomination of Norse?
Sonodites still believe in the old form of Norse, and religious institutions still practice the old rituals.
Sonodine still supports the new Romekate movement, it just can't contribute or anythin because of internal crises.
The Romekati government endorses a Christian-Norse hybrid religion.
After hearing positive news from the Northwestern Zedrelands, Arcon sends more representatives with the aim of opening up the region to Arconian trade, offering superior agricultural goods, and offers to bring representatives on an all-expense-paid journey around Arcon, to see areas that have both recently been developed, and cities that have existed for centuries.
With the continued projects utilizing the many Sonodite refugees, the nation's economy in land acquired years earlier has boomed substantially. A town in the south, once a small settlement, after taking in so many refugees has grown to be a large population center. This city's name is Sounette. The national rail is nearly 30% done in creating a line from Regnée to Sounette.