Here is the range of action and how it affects the surroundings:
The 590-foot radius is also known as the fireball (you may also find the term ‘nuclear detonation’ describing it) – almost immediately after the explosion, a huge orange balloon is emitted that spreads hot air and nuclear debris. In other words, a massive wave of heat, intense light, air pressure, and extreme radiation take over the area.
Anything within this area will be destroyed and in flames. The likelihood of you surviving if you are caught in this area or near it is close to zero.