Managing Your Horses During Drought Conditions

exercising your horse when its extremely hot heat stress can lead to heat exhaustion or even lifethreatening heat stroke.
If its hot and youre riding you really have to worry about heat exhaustion Hiney says. Really pay attention to their respiratory rate and heart rate when youre riding them. If theyre not recovering stop riding. Get up early to ride. Even if you try to ride late in the evening it takes a long time for the heat to dissipate so early morning is going to be your best chance to be able to exercise horses somewhat normally. 

Horses typically drink between 5 and 10 gallons of water daily. On extremely hot days their water intake can double even without exercising. When horses sweat they lose water containing much higher amounts of electrolytes than humans so its critical you replace them.
Theyre losing lots of water and electrolytes Hiney says. We want to make sure theres a source of salt at a minimum. If it has been really hot and weve been exercising them Id definitely recommend doing a little electrolyte replacement.