Odds are your lawn is dormant not dead but unfortunately, the answer is "it depends. There are many factors that can cause browning:
1. The variety of grass, eg. Kentucky Bluegrass, Bermuda, Zoysia, Fescue, etc.
2. Amount of water from rain or watering
3. How short or high the grass is cut
4. Various fungal diseases and pests

Grass Variety
Some of our weaker cool-season lawn grasses like the rye grasses, annual bluegrass and rough stalk bluegrass are most likely not to recover. Other common turf grasses like Kentucky bluegrass or the fescues are more likely to survive. If you are fortunate to have a warm-season lawn (e.g. zoysia grass or bermuda grass) these lawns are likely not dead.
Following is a link to Univ of Purdue Extension with more info:
https://turf.purdue.edu/my-lawn-is-brown-and-crunchy-is-it-dead-what-do-i-do-now/

Grass Cutting & Watering
Many lawns have turned brown recently. If you look closely, you will see that most have been mowed very short, even "scalped." Most still-green lawns are mowed higher, at the recommended height of 3" (or the highest setting at which your mower can be set). By mowing higher, the grass plants have more leaf surface to feed the roots. No more than 1/3 of the grass height should be removed. Turf grass requires approximately 1 to 1.5 inches of water per week. When watering the lawn, apply this amount in a single application or possibly two applications three or four days apart. Following is a link to Iowa State Univ Extension with more info about cutting lawns and watering:
https://www.extension.iastate.edu/news/2007/jul/070201.htm

Pests & Diseases
Browning can also be caused by fungi which can result in Brown Patch as well as insects like webworms and grubs. Following is a link to Univ of Illinois Extension with more info:
https://extension.illinois.edu/blogs/flowers-fruits-and-frass/2018-08-29-brown-spots-lawn

Attached is a fact sheet from Univ of Michigan Extension about summer lawn care.

What does your lawn care company say about the browning?