Little dizzy and very tired. Can sunstroke have these effects?

Heat exhaustion. When the body overheats, the brain overheats which can cause neurological symptoms (confusion, headache, vomiting, coma) or death. If you suspect someone having sunstroke --you must cool the person down asap! the sports trainers usually have ready-to go portable icebaths on the field during these '2 a day football practices' @ the nfl & college level. Prevention is the best treatment: hydrate!