Russian troops dug a 8-km (5-mile) long canal to keep fires caused by a record heatwave away from a nuclear arms site, local media said on Saturday as air pollution from the crisis rose to more than six times above normal. Forest and peat fires by the highest temperatures ever registered in Russia have killed at least 52 people, made more than 4,000 homeless, diverted many flights and forced Muscovites to wear surgical masks to filter out foul air.
"The fire situation in the Moscow region is still tense, but there is no danger either for residential areas or for economic sites," an Emergencies Ministry spokesman said.