How do the heavens 'blaze forth' the death of Julius Caesar?

Dear student,

Calpurnia sees horrible and frightening dreams. She saw a lioness giving birth on the streets, fierce warriors fighting a bloody fight and blood falling on the Capitol, ghosts shrieking and squealing in the streets, the dead coming out of the grave. All these were unnatural happenings and indicated bad omen. Thus heavens “blaze forth” the death of Julius Caesar.

Regards