Changed to Modern era.

Is there a mod that lets city states build dams as well?

The Dutch made dykes and reclaimed land from the sea in medieval times. Why do we have to wait so long for flood barriers?

agreed
atomic era is to late

Atomic Era is way too late.

I think it would be awesome if the city-state automatically gained flood barriers if their current suzerain has researched computers. But maybe that's just me.

maybe move it to modern era because flooding already starts there?

Ok thanks , game current industrial ended , thou me beyond that i got flood barriers up but nobody else dose and 20 turns till sea level rise.

It's when the game reaches the atomic era (check the era score menu), not when you reach atomic techs in the tech tree.

I researched computers in current game , even several turns(10 or more) city states not gotten flood barriers. Is there certain point in atomic era , like tech? It may a mod conflict on my end or something.

It does work for me. I integrated the fix you mention in the 2nd update.
Note that the game already gives free walls to city states (but maybe only on higher difficulties, not sure).

Can you try with no other mod active?

Hi, seems like this is not working, what should I have to edit in the .sql for the flood barriers to be given before the atomic era? Is that possible?
Already tried this: "Well, you only need to replace REQUIREMENT_GAME_ERA_ATLEAST_EXPANSION with REQUIREMENT_PLAYER_ERA_AT_LEAST in FreeFloodBarriers.sql", but it doesn´t seem to work for me. Could this mod be incompatible with civitas city-states which also grants free walls to them?

Might be an idea to include that solution in the mod's description in case it gets lost again, as well as an explanation about what it does for people to understand whether they would want/need to use it or not.

@Vael - That was me. It seems my comments have been deleted. Steam...
@Adriaman - You're welcome. I have a similar mod that I created last year for this same purpose.

Well, you only need to replace REQUIREMENT_GAME_ERA_ATLEAST_EXPANSION with REQUIREMENT_PLAYER_ERA_AT_LEAST in FreeFloodBarriers.sql

must admit, it would be humorous to see city states prepped for mass floods....in 2500BCE.

y'know with all those ancient coal powered chariots.

@Vael Yes there was, and I applied it from memory.
Thanks for the anonymous commenter!

Wasn't a solution shown here in the comments a while ago?