Will seedlings survive and thrive?

yeah, they'll survive. it will impact rate of transpiration which impact rate of intake at roots... so, you may need to reduce feed concentration becaue the plant will be taking in more water per day, but still only needs teh building for normal or reduced rate of growth at same time... the building blocks may be in solution, but it is the number of building blocks that matter, not the volume or water... within common sense ranges... hypo- or hyperhidrosis is a problem for any life on earth - not talking about that sort of context. observe and react... see it first, then adjust relative to amplitude of problem. but, i'd wager it needs a slightly reduce concentration than you normally provide in better environments. if this is a normal context, then keep doing what you did before if it worked well.

I believe that strain is a bit resistant to heat so it won't suffer as much as others. If I were you I'd compensate for that low humidity because at this stage seedlings need around 70% humidity and then gradually reduxe humidity until the 40% mark at the flowering stage. In turn higher humidity should help slightly lower the temperatures