As long as your sanitation is impeccable and you have your wort in a sealed, sanitized vessel, then you could store it for some time. I have done this on my last couple of brew days because I wash yeast, did not have time to make a starter ahead of time, and felt like brewing anyway! I pulled 1/2 gal of boiled wort before adding my first hop additions, cooled it, and pitched my saved yeast. I chilled the batch as much as I could with my chiller (around 60°), sealed the bucket, and tossed it in my fermentation chamber and set the temps for mid 40°'s. The yeast was at high krausen about 24 hrs later. I racked to a carboy leaving behind all the hop and break material, aerated, and pitched. The batches took right off and I have not seen or tasted any problems so far. Cold temps will inhibit bugs and beasties. You could freeze wort and save it even longer. And there are a ton of no chill brewers out there that would tell you to sanitize like crazy and RDWHAAHB!!!