system
Given the following post, respond as if you're commenting on Reddit:
human
Would being underwater help survive a nuclear bomb?

If I jump in my pool, on the river near my house knowing that a nuclear bomb, or atomic or H-Bomb exploded around 10 km from my house, would I survive?

The way I see it is that water will protect me from the heat, so then I will be able to surface up after the explosion and escape.
gpt
If it was a powerful airburst, in a clear cloudless sky, the thermal radiation from the initial burst, expanding at the speed of light, could give you severe burns before you realize anything unusual was afoot.  If you were looking in the wrong direction at the wrong time, you're also blind now. 

A modest weapon – 100kt – isn't going to do much blast damage at 10 km. So if the prompt thermal radiation didn't get you, you might not even need the pool to evade the pressure wave. And if you're upwind of the blast,  you may not have to worry about fallout.

A 1 or 2Mt airburst is a different story.  A 10km, you're probably toast regardless.  The thermal radiation will spontaneously ignite suseptible materials out to 10km and beyond.  Blast effects will be harder to survive as well.