The upheaval in the sky in Julius Caesar is a significant event that symbolizes the chaos and disruption that is about to unfold in Rome. This dramatic occurrence is described by Casca in Act 1, Scene 3, as he recounts the strange and unnatural happenings he witnessed during a stormy night.

The Upheaval in the Sky:
During the storm, Casca observes several extraordinary phenomena in the sky, including a slave's hand that appeared to be on fire but was not consumed, a lion roaming the streets, and an owl hooting at noon. These abnormal occurrences are believed to be omens, warning signs of impending disaster and political upheaval.

Symbolism of the Upheaval:
1. Chaos: The upheaval in the sky symbolizes the chaos that is about to engulf Rome. It foreshadows the forthcoming civil war and the disruption of the established order.

2. Divine Intervention: The abnormal celestial events are interpreted as the gods' intervention in human affairs. The Romans believed that such signs were messages from the gods, indicating their displeasure and signaling a change in the political landscape.

3. Political Unrest: The upheaval in the sky serves as a warning of the political unrest that will follow Caesar's rise to power. It reveals the discontent and opposition among the Roman elite, who see Caesar as a threat to the republic.

4. Power Struggle: The unusual occurrences in the sky reflect the intense power struggle between Caesar and his opponents. The lion symbolizes the fierce and predatory nature of those vying for power, while the owl hooting at noon signifies the unnatural and disruptive nature of the impending conflict.

5. Foreboding: The upheaval in the sky creates a sense of foreboding and impending doom. It heightens the tension and anticipation of the events that will unfold, serving as a warning to both the characters in the play and the audience.

In conclusion, the upheaval in the sky in Julius Caesar represents the chaos, divine intervention, political unrest, power struggle, and foreboding that will shape the events of the play. It serves as a powerful symbol, effectively setting the stage for the turmoil and upheaval that will soon engulf Rome.

it is a bad omen indicating Caesar's death in the near future.