I am sure there is a more appropriate place to post this, but ... here goes.
I know my plants, but I don't know my lawn. AT ALL.
I think this Bermuda grass, and the pictures below are of my front yard, south facing, in Texas. Hotness will be coming very soon.
The lawn care people - who we let go, for economic reasons, were re-consulted and we were told the grass was dead. There are weeds pushing up through. We don't treat with herbicides, and I have been pre-occupied with my veggie garden and my flowers to deal with it.
(1) Is this grass dead?
(2) Do we need to re-sod?
(3) If it is only mostly dead (see Princess Bride), will it come back without us trying to find the money to re-sod?
(4) Can you oversow Bermuda?
I's next to impossible to kill bermuda. It does not like shade, but other than that, once the night time temperatures get above 50 degrees it should start comming back. I would cut it short so the soil warms quicker. Lay down some manure which is inexpensive and give it plenty of water for a week or so to give it a jump start. Once it gets going, it will spread and fill in the bare spots.