NEW : Russian President visits the station . Carbon monoxide levels are dangerously high in Moscow . People are encouraged to stay indoors and wear masks . Many who did not could be seen wearing masks as they walked outdoors . There are no signs of the heat wave abating , and wildfires are still burning in the countryside .
NEW : Russian President visits the station . Carbon monoxide levels are dangerously high in Moscow . People are encouraged to stay indoors and wear masks . There are no signs of the heat wave abating , and wildfires are still burning in the countryside .