Nina Shono, 80, one of eight people sheltering in a basement beneath the ruins of their five-storey apartment building, made soup and baked bread on a homemade wood-burning stove in the darkness while a rat scampered in a corner.
"When we were bombed, we were praying and I was crossing myself, everything was collapsing. One explosion. The second explosion, the third. But we are still sitting here," she said.
In the biggest rebel stronghold Donetsk, occasional artillery fire could be heard through the night and on Monday morning, although it was not clear who was firing and it was far less intense than before the truce.
The separatist press service DAN reported two homes destroyed by shelling on the city's outskirts overnight.
Nearly a million people have been driven from their homes by the war between pro-Moscow separatists in eastern Ukraine and government forces. Rebels say they launched their advance because previous battle lines had left their civilians vulnerable to government shelling.
Donetsk resident Sergei, 52 said he could do no more than hope that the truce would work out. "No one knows what will happen with the way the sides are behaving," he said.
Kiev fears unrest could spread to other parts of the mainly Russian-speaking east, where its troops are in control and most residents are loyal but violent separatist demonstrations have occasionally flared in the past year.
Two people were killed on Sunday in Kharkiv, 200 km (125 miles) from the war zone, in a blast at a pro-Ukrainian rally. Kiev said it had arrested four suspects who had received weapons and instructions in Russia.