Putin thanked Trump for the offer but said a group of airplanes had been formed in Siberia to fight the fires, according to a translation of the statement. Putin said that Trump’s call was a signal that “in the future, it will be possible to restore full-format relations between the two countries.”

The White House later confirmed the call and said that the two leaders also discussed trade.

Relations between the U.S. and Russia deteriorated after American intelligence agencies determined that the Kremlin interfered in the 2016 election on Trump’s behalf. The U.S. issued sanctions against Russia both for the election interference and the attempted murder of a former Russian spy in the U.K. that the British government blamed on the Kremlin.

Trump has nonetheless tried to maintain a personal friendship with Putin. The two leaders agreed to continue discussions by phone and in meetings, the Kremlin statement said.

Putin ordered the Russian military to help fight the Siberian fires earlier on Wednesday. Russia has declared a state of emergency in four Siberian districts because of the fires. Plumes of smoke visible from space have stretched across the region to the Ural mountains thousands of miles away.

June temperatures in the Siberian districts were about 10 degrees Fahrenheit (6 degrees Celsius) above the 30-year average from 1981 to 2010. About 3 million hectares were burning as of Wednesday, according to the country’s Federal Forestry Agency.

Wildfires in the U.S. haven’t always drawn sympathy from the American president.

Trump sparked outrage last year as wildfires devastated parts of California by insisting that poor forest management by the state’s Democratic leaders was to blame. He threatened to withhold federal money for maintaining the forests even as the fires raged through Butte County north of Sacramento, effectively destroying the town of Paradise and killing dozens of people.

After a backlash, Trump softened his tone and approved an expedited request for disaster aid.

Nevertheless, Trump has proposed cutting the U.S. Forest Service’s funding for the national forest system by as much as 19%. Some of the programs designed to reduce wildfire risk, including restoring forest landscapes and the Integrated Resource Restoration Pilot, would be eliminated altogether.

More must-read stories from Fortune:

—In a debate over differences, these are the topics not discussed on night one

—Democrats spar over health care, race, and gun violence in high-energy debate

—4 things we learned from night one of the second Democratic debate

—Highlights from the first night of the second Democratic debate

—Detroit happily steps into role of political HQ as Democrats gather for debate