https://blogs.mercola.com:443/sites/vitalvotes/archive/2026/08/22/summer-fatigue-causes-why-you_1920_re-tired-it_1920_s-not-just-the-heat.aspxSummer Fatigue Causes: It's Minerals, Not the Heat You drank 80 ounces of water yesterday. You still hit a wall in the afternoon Summer fatigue causes are usually mineral-related, not temperature-related. Sweat carries sodium, potassium, and magnesiumenCommunityServer 2008.5 SP1 (Debug Build: 31106.3070)