Final answer:
The United States evacuated its citizens from the West Coast and Congress declared war on Japan the next day in response to the attack on Pearl Harbor.
Step-by-step explanation:
The United States took the following actions immediately after the attack on Pearl Harbor:
- The US evacuated citizens from the West Coast.
- Congress declared war on Japan the next day.
These actions were taken to safeguard American citizens and respond to the attack on Pearl Harbor.
Learn more about The United States' response to the attack on Pearl Harbor