Summarize the following:
Many people make their journey much harder by underestimating their water needs. Trying to ration your supply is a mistake that can cost your life. If you notice any of the following symptoms, drink more water:  Urine with a dark color or a noticeable smell. Dry skin Dizziness Fainting If you feel lightheaded or nauseous, or if your skin feels cool and clammy, seek shade immediately. Rest and treat yourself as follows:  Remove or loosen your clothing Sip a sports drink or slightly salty water (about 5 mL salt per liter water / 1 tsp per quart). Apply wet cloth on your skin to aid cooling evaporation. Warning: if untreated, this can progress to heatstroke. This causes muscle cramps, red skin that no longer sweats, and eventually organ damage or death. Most mammals and reptiles will stay away from you, especially if they are alone. Follow the same practice and be aware of your surroundings to avoid accidentally cornering something. If possible, research the wildlife of the local region beforehand so you know how to respond to specific species.  Do not reach into small spaces or under rocks without poking it with a stick first. Scorpions, spiders, or snakes could be hiding there. In areas with killer bees, be alert and stay away from hives. Although it's not hard not to touch a cactus, you may not know that some of them scatter spiky burrs on the ground to spread their seeds. Although usually not a high priority, it's a good idea to steer clear of the area. In the worst-case scenario, you could cut yourself and get an infection.

Summary:
Watch out for signs of dehydration. Rest if you experience heat exhaustion. Stay away from dangerous animals. Steer clear of spiny plants.