. >> reporter: as these men layed irrigation pipe in a yolo county field, united farm workers advocates warned them to drink plenty of water. >> reporter: it was in the 90s a slight break from the sixth consecutive day in the 90s. >> reporter: jesus says he feels the heat coming through his shoes all the way up through his body. he and the other farm workers we talked with prefer only to use their first names. they dress on layer of layer of heavy clothing trying to make themselves sweat hoping the sweat will cool them off but still they say they fear they will become dehydrated and dizzy and they too will die out here. >> when it's 102, you should see how we were all sweaty. working with a brutal thirst. >> reporter: just yesterday the body of another farm worker was found in the bakers field area. that makes four workers dead of suspected heat stroke in the past nine days. two in the fresno area and two near bakers field. calosha has started making public service announcements on public speaking radio and television stations advising workers how to avoid heat stroke. >>> cesar chavez