 From noon today to about 8, hot temperatures and high humidity may cause heat illnesses. You need to stay hydrated, drink plenty of fluids, stay in an air-conditioned room if you can, stay out of the sun, and check up on relatives and neighbors. If you are working outside, take extra precautions when outside. Wear some lightweight clothing, loose-fitting clothing, and try to limit some of the strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. That can be very, very serious.