China Naming Network - Company naming - What do you mean by bad weather?

What do you mean by bad weather?

Unfavorable days are rainstorm, thunderstorm, heat island and flu. Rainstorms mainly occur on July 27 (daytime), 8/ 1 (daytime), 8/3 (daytime) and 8/1,and heat islands mainly occur on July 26, 7/3 1 (daytime) and 8/7.