The next phase of this project is to delve into each of the major vertical industry areas represented by GITA's members and constituents in order to define and discuss these important connections, how these interdependencies might influence the ways in which we respond to our infrastructure crisis, and the emerging key role of geospatial technology in protecting our critical infrastructure and improving emergency response.
On the flop = number of flush outs x 4 = (13-4)x 4 = 36%. On the turn = number of flush outs x 2 = (13-4)x 2 = 18%. Obviously a naked flush draw is not a very good hand to move all-in with on the flop since you are most likely to be up against a much stronger hand if your opponent raises you.
So the probability is $\dfrac{40}{2598960} = \dfrac{1}{64974} \approx 0.00001539\ldots$. The probability will increase if you can have more than five cards to choose from. The probability that somebody will have a straight flush will increase if the number of players increases.