The information on poll closings came from http://www.270towin.com. They have a page and set the times of state polls closing to the EST in which the last polls in that state close (if it happens to cross two time zones, like FL) which is the earliest it could be called.
They listed all closings in EST to make it simpler, so that’s the model I used.
Texas polls close at 7pm local time. That means that only Democrat controlled El Paso and some patches of desert will be closing at 9pm eastern. The presidential race will be decided before the North Juarez come in.
Florida might be decided on the Central zone votes, but most of the polls there also close an hour earlier than the ‘poll closing times’ shown on the list.