* WHAT...For the Heat Advisory, temperatures in the mid to upper 80s near the coast, up to 94 inland. For the Extreme Heat Watch, dangerously hot conditions with temperatures 85 to 90 near the coast, up to 105 inland. * WHERE...Orange County Coastal Areas, Orange County Inland Areas, San Bernardino and Riverside County Valleys-The Inland Empire, San Diego County Coastal Areas, and San Diego County Valleys. * WHEN...For the Heat Advisory, until 8 PM PDT this evening. For the Extreme Heat Watch, from Monday morning through Friday evening. * IMPACTS...Early time of year and prolonged nature of this heat event will lead to increased risk of heat illness, especially for vulnerable populations and those without cooling systems. * ADDITIONAL DETAILS...Slightly cooler this weekend. High temperatures next week will be 20 to potentially 30 degrees above normal for this time of year, where record breaking heat is likely.