Question

what does the upheaval in the sky indicate? how does calpurnia's dreamcome true?? in 30-40 words

Answer 1

 The upheaval in the sky indicate that there is something wrong or some thing is disrupting....something like bad omen.And that 's the reason why she asked Caesar not to go to the senate house, because she and the watch had some terrifying dreams which indicates bad omen...
    Calpurnia had a dream that, she saw Caesar's statue which like a fountain with an hundred spouts ran pure blood and many lusty romans came smiling and did bathe their habds in his blood.
  And as she dreamt Caesar was killed and his blood did run out as a fountain. And the conspirators were the lusty romans who came smiling as they killed Caesar.
  Hope This Helps!!! 

Answer 2

Upheaval meant the bad omen or the vision that calpurnia had of Caesar's death.Her dream came true when Brutus took Caesar to the palace and stabbed him along with the other conspirators of Caesar's death.