It will be another hot and hazy day in Maryland on Tuesday, where there is a code orange for poor air quality with temps in the low 90’s. High temperatures and extreme heat can cause children to become sick. It can cause dehydration, heat exhaustion, heat cramps and heat stroke, which is a medical emergency. University of Maryland Baltimore Washington Medical Center, chair of pediatrics, Dr. Esther Liu said its important for parents to watch for symptoms of heat illness.