...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM PDT TUESDAY... * WHAT...Dangerously hot conditions with temperatures 100 to 105 expected. Overnight temperatures will be slow to cool off each evening, only falling below 70 degrees for a short period each night, if at all. The warm nighttime temperatures will limit chances to recover from the heat, exacerbating the risk of heat-related illness in this prolonged heat wave. * WHERE...Portions of northwest and west central Oregon and southwest Washington. * WHEN...Until 10 PM PDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...The most intense portion of this heat wave has not yet occurred. The hottest temperatures are expected Monday and Tuesday, with Monday night being the warmest night. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sunshine, and check up on relatives and neighbors. Do not leave ...