Hydration

Hydration in Heat and Humidity

Heat quietly doubles your fluid needs.

3 minHydrationHealthy Aging

Sweat rates can exceed a liter per hour in hot weather — plain water alone can dilute sodium.

Pace yourself indoors and out, and mix in electrolytes when sweating heavily.

Practical steps

  1. 1Add a pinch of quality salt or an electrolyte packet on hot days.
  2. 2Avoid caffeine spikes in the heat.
  3. 3Rest in shade or A/C every 20–30 minutes outdoors.

Try This Today

Freeze a bottle overnight for tomorrow's errands.

Related in Hydration

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3 min · Small sips beat one big glass at bedtime.

Signs You're Under-Hydrated

3 min · Thirst is a late signal — watch these instead.