Summer is a time of hard work and high temperatures. That’s why it’s important for farmers and ranchers to know the signs of heat stress and exhaustion.“But with prolonged exposure to the sun and heat, people are more at risk for heat-related illness or hyperthermia,” Dr. Mark Faries, AgriLife Extension state health specialist, said.Knowing the warning signs of heat stress and how it progresses, as well as what to do in response to dif ferent levels of heat-induced illness, is extremely important for those in agriculture who spend the majority of their time outside.SymptomsSymptoms of heat illness include:■heavy sweating■muscle cramps■weakness■dizziness■nausea■weak ...