After heat exhaustion, your body needs fluids, electrolytes, and easily digestible food to recover. Full recovery typically takes 24 to 48 hours, and what you eat and drink during that window makes a real difference. The priority is replacing water and sodium first, then gradually reintroducing food as your stomach settles.
Start With Fluids and Salt
Before thinking about food, focus on rehydration. Plain water helps, but your body also lost significant sodium and other minerals through sweat. A simple oral rehydration solution works well: half a teaspoon of salt and half a teaspoon of baking soda mixed into a quart of water. If you don’t have baking soda, a pinch of salt and sugar in water will do. Commercial oral rehydration mixes and sports drinks with a low sugar concentration (around 1 to 3% carbohydrate) are also effective.
Sip slowly rather than gulping. Heat exhaustion often brings nausea, and drinking too fast can make it worse. If you can’t keep fluids down or you don’t feel noticeably better within an hour of resting and rehydrating, that’s a sign you need medical attention rather than more home care.
Why a Little Sugar Helps You Absorb Water Faster
Adding a small amount of sugar to your rehydration fluid isn’t just for taste. In your intestines, glucose activates a specific transport mechanism that pulls sodium and water into your bloodstream. Water absorption is a passive process: it follows wherever dissolved nutrients go. A drink that combines glucose with fructose (or uses regular table sugar, which breaks down into both) actually absorbs faster than one with glucose alone, because the two sugars use different transport pathways in your gut. This is the principle behind oral rehydration solutions and sports drinks, and it’s why plain water alone rehydrates you more slowly than water with a bit of sugar and salt.
Best Foods for Electrolyte Recovery
Once your nausea subsides enough to eat, choose foods rich in potassium and magnesium. These are the two electrolytes most depleted by heavy sweating, and food is an efficient way to replenish them.
For potassium, some of the most concentrated sources are:
- Baked potato: 1,081 mg per potato
- Raisins: 1,089 mg per cup
- Cooked spinach: 839 mg per cup
- Bananas: 594 mg per cup
- Cantaloupe: 494 mg per cup
- Orange juice: 496 mg per cup
- Plain yogurt: 579 mg per 8 ounces
- Avocado: 180 mg per ounce
For magnesium, reach for nuts, seeds, and whole grains. An ounce of almonds provides 80 mg of magnesium (20% of your daily value), and cashews are nearly as good at 75 mg. A baked potato with skin delivers about 50 mg. Peanut butter, oatmeal, brown rice, and black-eyed peas are all solid options too. Spinach pulls double duty here, supplying both potassium and magnesium in meaningful amounts.
High-Water Foods That Help You Rehydrate
If drinking large volumes of fluid feels unpleasant, water-rich fruits and vegetables can supplement your rehydration. Many common produce items are over 90% water by weight:
- Cucumber: 96% water
- Celery: 95% water
- Tomato: 94% water
- Zucchini: 94% water
- Watermelon: 92% water
- Strawberries: 92% water
- Bell pepper: 92% water
- Broccoli: 92% water
Watermelon is particularly useful because it delivers water, natural sugars, and potassium in a form that’s easy on a queasy stomach. Cucumber slices or chilled tomato soup work well too. These foods won’t replace proper rehydration fluids, but they contribute meaningfully to your total fluid intake while also providing vitamins and minerals.
How to Pace Your Eating
Your digestive system may not be ready for a full meal right away. Heat exhaustion diverts blood flow away from your gut and toward your skin (to cool you down), which can leave your stomach sluggish and irritable even after your body temperature starts coming back to normal.
Start with small amounts of bland, easy-to-digest food. Crackers with a little salt, plain toast, a banana, or a cup of broth are good first steps. If those sit well after 20 to 30 minutes, you can move to more substantial options like yogurt, oatmeal, a baked potato, or rice with cooked vegetables. By the next day, most people can return to their normal diet, though continuing to emphasize potassium and magnesium-rich foods for a couple of days supports full recovery.
What to Avoid During Recovery
Skip caffeine and alcohol while you’re recovering. Both promote fluid loss and can worsen the dehydration your body is already fighting. Coffee, energy drinks, and tea with caffeine all count. Even if you’re a regular coffee drinker, hold off until you’ve fully rehydrated and your symptoms have resolved.
Heavily processed, greasy, or very spicy foods are also worth avoiding in the first several hours. They’re harder to digest when your gut is already under stress, and they’re more likely to trigger nausea. High-protein meals like steak or large servings of meat generate more metabolic heat during digestion, which works against your body’s efforts to cool down. Stick with lighter fare until you’re clearly feeling better.
Very sugary drinks like soda or undiluted fruit juice can also slow fluid absorption. The ideal carbohydrate concentration for rehydration is low, around 1 to 3%. If you’re drinking juice, dilute it with water to cut the sugar concentration roughly in half.
A Simple Recovery Meal Plan
In the first hour or two, sip an oral rehydration solution or diluted sports drink alongside small bites of salted crackers or plain bread. Once nausea fades, have a banana or a few slices of watermelon. Within a few hours, aim for a light meal: a baked potato topped with plain yogurt, a bowl of oatmeal with sliced banana and a handful of almonds, or rice with cooked spinach and avocado. These combinations hit potassium, magnesium, sodium, and gentle carbohydrates all at once.
Keep drinking fluids steadily over the next 24 to 48 hours. Your urine color is the simplest gauge of hydration status. Pale yellow means you’re on track. Dark yellow or amber means you need more fluids. Don’t wait until you feel thirsty, since thirst is a lagging indicator that kicks in after you’re already mildly dehydrated.