goers. >> reporter: brian sibley for the joint information center says the heat is just another danger to the workers to take into consideration. tents, fans and lots and lots of water make up the first line of defense. >> you got to drink one bottle of water every break. >> supporting them protecting them from the shift is they work in short shifts, usually 15 to 20 minutes and get out of the sun and rehydrated, rested and ready to go back out. safety is the absolute first priority on all of the crews. >> reporter: but this kind of extreme heat expected through the weekend and no end of the cleanup in sight, workers expect a long, hot summer ahead. and cnn photo journalist dominic swan is behind the camera. right now, live around 80 degrees, maybe a touch above. humidity extremely high and we also have cnn meteorologist and one of the best on the planet