After heavy rain Sunday night, Beijing cooled off. Above the city, a sea of clouds spread out from the west against a pure blue sky. (Photos: Beijing Daily; Compiled by Mei Yibo)

After heavy rain Sunday night, Beijing cooled off. Above the city, a sea of clouds spread out from the west against a pure blue sky.

After heavy rain Sunday night, Beijing cooled off. Above the city, a sea of clouds spread out from the west against a pure blue sky.

After heavy rain Sunday night, Beijing cooled off. Above the city, a sea of clouds spread out from the west against a pure blue sky.

After heavy rain Sunday night, Beijing cooled off. Above the city, a sea of clouds spread out from the west against a pure blue sky.

After heavy rain Sunday night, Beijing cooled off. Above the city, a sea of clouds spread out from the west against a pure blue sky.

After heavy rain Sunday night, Beijing cooled off. Above the city, a sea of clouds spread out from the west against a pure blue sky.