What were the two last-minute problems in American attack on Tokyo?

1. Fires in the city: The air raid on Tokyo on March 9-10, 1945, was initially scheduled for the night of March 9. However, a strong wind suddenly blew up, causing fires to spread throughout the city. This made the target area difficult to identify and increased the risk of civilian casualties.

2. Bad weather: The weather conditions in Tokyo on the night of March 9 were also unfavorable. Thick clouds and rain reduced visibility and made it difficult for the B-29 bombers to accurately drop their bombs.