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Hydrated Glow Reference Guide

U.S. hydration and
heat statistics.

A concise, source-linked collection of hydration benchmarks and heat-illness estimates for writers, researchers, and everyday planning.

Last updated

Four facts at a glance

Hydration needs are personal, and heat illness is preventable but serious. These figures are useful reference points, not individualized medical advice. Follow the source links for full definitions, methods, and context.

2.7 L

adequate-intake benchmark for adult women

This includes water from beverages and food, not just plain water. Individual needs can be higher or lower based on activity, climate, health, and pregnancy or breastfeeding status.

Source: National Academies, 2005
3.7 L

adequate-intake benchmark for adult men

The National Academies describe this as total water from drinks and food. It is a population-level benchmark, not a one-size-fits-all daily prescription.

Source: National Academies, 2005
702

estimated annual U.S. heat-related illness deaths

The CDC cited this annual estimate in its 2022 report on access to cooling centers. It underscores why heat exposure deserves practical planning, especially during physical activity and outdoor work.

Source: Centers for Disease Control and Prevention, 2022
67,512

estimated annual U.S. heat-related emergency department visits

The CDC reported this annual estimate alongside heat-related mortality data. Heat illness can become urgent, so severe or worsening symptoms should be evaluated promptly.

Source: Centers for Disease Control and Prevention, 2022

Sources and Method

How these figures were selected

This page uses primary public-health and scientific sources. The water figures are adequate-intake benchmarks published by the National Academies in 2005. The heat-illness figures are annual U.S. estimates cited by the CDC in 2022. Hydrated Glow does not calculate, adjust, or project the numbers.

For personal guidance, especially during pregnancy, while managing a health condition, or when taking medicines that affect fluid balance, speak with a qualified clinician.

Cite this page

Hydrated Glow. “U.S. Hydration and Heat Statistics.” Updated September 9, 2026. https://hydratedglow.com/hydration-statistics

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