Reference: Sato Shiori's blog
http://www.keyakizaka46.com/s/k46o/diary/detail/7807

 

Moriya Akane's selfie
http://www.keyakizaka46.com/s/k46o/diary/detail/7810

 

Member Ozeki Rika also uploaded a photo with 45 degree celsius on the same day.

Reference: Ozeki Rika's blog
http://www.keyakizaka46.com/s/k46o/diary/detail/7813

On the other hand, another member Suzumoto Miyu also updated her blog, and her post contains two set of "Dot", one set is 18 dots, another set is 45 dots.

Reference: Suzumoto Miyu's blog
http://www.keyakizaka46.com/s/k46o/diary/detail/7806

Other members' blog posts with numbers 4 and 5:
Sasaki Mirei's post
http://www.keyakizaka46.com/s/k46o/diary/detail/7802
Saito Kyoko's post
http://www.keyakizaka46.com/s/k46o/diary/detail/7803
Kobayashi Yui's post
http://www.keyakizaka46.com/s/k46o/diary/detail/7805
Uemura Rina's post
http://www.keyakizaka46.com/s/k46o/diary/detail/7809
Saito Fuyuka
http://www.keyakizaka46.com/s/k46o/diary/detail/7811
Oda Nana's post
http://www.keyakizaka46.com/s/k46o/diary/detail/7812
Koike Minami's post
http://www.keyakizaka46.com/s/k46o/diary/detail/7815
Harada Aoi's post
http://www.keyakizaka46.com/s/k46o/diary/detail/7817
Imaizumi Yui's post
http://www.keyakizaka46.com/s/k46o/diary/detail/7818
Kato Shiho's post
http://www.keyakizaka46.com/s/k46o/diary/detail/7819
Habu Mizuho's post
http://www.keyakizaka46.com/s/k46o/diary/detail/7826