What released an estimated 8.7 million tons of the global warming gas?

California’s wildfires sent millions of tons of carbon dioxide into the atmosphere. University of Colorado researchers report that from October 19th to the 26th, an estimated 8.7 million tons of the global warming gas were released. Armed with that report, a key U.S. House committee on energy and warming sought answers from a panel of scientists.
Question: What released an estimated 8.7 million tons of the global warming gas?

In Romania, to the east, and Slovakia and the Czech Republic, to the north, populations in low-lying areas have been put on alert. In the Czech Republic, several people have died, and anti-flood barriers on the river Vltava have been raised. Czech officials have declared a state of emergency in several areas, and in the historic city of Olomouc, 250 kilometers east of Prague, thousands of people had to be evacuated.
Question: In which country have several people died because of the flood?