If im working in the heat is it better to drink water or gatorade?

Both: If working/exercising and significantly sweating for more than one hour, then an electrolyte solution like Gatorade is a good idea to replenish lost sodium, potassium, etc. You don't need to rely only on Gatorade, and a combination of water and Gatorade is the best idea. Gatorade also will provide some calories via sugar/carbs.

Both: You need to fluid but also you need to replenish your electrolytes and other nutritionial material that Gatorade can give you

Hydration: Always drink as much water for hydration as possible. Gateare has 22 tsp of sugar so may increase blood sugar.

Water: because working in heat make you dehydrated so drinking water will help you.

Gatorade: If you sweat a lot , you will lose electrolytes as well as water thus Gatorade would be a better choice

Hydration: The body loses water , sodium, and potassium when we sweat. Drinking just water can help, but for the cells to use that water it has to have sodium and glucose available. Gatorade is formulated for this, but drinking water and eating a sandwich is just as good, helping the body to retrieve necessary electrolytes. Water alone is not enough.