First of all is it really all brown? If you pulled up a stalk and
peeled back the brown would you find some green blades hidden inside?
If there is a little green then it might still survive but look ratty
for a couple of years.

If it really is all dead, you have a few options. How do your
neighbours' look? If everyone's in the same boat because of the heat
wave, you guys can get together and let the builders know you all need
to be re-sodded.

If you're the only one, you might have to rip up the dead sod and redo
it yourself. Rolls of sod's not very expensive, just a lot of work.
It's a perfect opportunity to plan your walkway and garden, then you
only need to sod a small portion of your yard. You can also use this
opportunity to plant an eco-lawn:

http://www.wildflowerfarm.com/Mercha...egory_Code =E

I visited these folks last week, they're moving to Orillia next year
so you might want to check them out while you can. I hope it works
out.