* WHAT...Hot conditions with high temperatures between 85 to 95 degrees expected and low temperatures between 55 to 60 degrees. This will pose a moderate risk of heat-related illness. * WHERE...Portions of northwest and west central Washington. * WHEN...From 11 AM Monday to 11 PM PDT Tuesday. * IMPACTS...Heat will significantly increase the risk of heat-related illnesses for those who are sensitive to heat, especially those without effective cooling or adequate hydration. * ADDITIONAL DETAILS...Temperatures will peak on Tuesday with the hottest locations expected to be in the low 90s in the Puget Sound region and mid 90s in areas south of Olympia.