Election night could be really really long
but if all goes as they have with just a few differences you get exactly 269, 269. Some of those scenarios include what their map shows now except
Colorado goes D and not R.
Louisiana goes D and not R
Montana and Arkansas go D and not R
There are clearly lots and lots of others scenarios that get you to the same point, but those are just a few that were obvious or conceivable given the margins in those state. I'd have to get the Bayesian modelers set the supercomputers chomping what the probability of a literal tie is. Could the future of the US be determined by the by-district allocation of electors in Maine or Nebraska.
Time is ticking, but it is still a political eternity between now and November.