* WHAT...Large breaking waves of 4 to 7 feet with sets up to 10 feet, highest at south and southwest-facing beaches. Strong and dangerous rip and longshore currents. Minor coastal flooding from a combination of high surf and high astronomical tides during the evenings. * WHERE...Beaches of Orange and San Diego Counties. * WHEN...Through 11 PM PDT Tuesday. * IMPACTS...Flooding of lots, parks, and roads with isolated road closures expected. Dangerous swimming and surfing conditions and beach erosion. * ADDITIONAL DETAILS...Predicted higher high tides: Newport Beach: Today: 6.2 feet at 7:08 PM. Tuesday: 6.4 feet at 7:59 PM. La Jolla: Today: 6.1 feet at 7:03 PM. Tuesday: High 6.3 feet at 7:54 PM PDT. Recently, actual tide levels have been measured at roughly six inches higher than predicted levels.

* WHAT...Large breaking waves of 4 to 7 feet with sets up to 10 feet, highest at south and southwest-facing beaches. Strong and dangerous rip and longshore currents. Minor coastal flooding from a combination of high surf and high astronomical tides during the evenings. * WHERE...Beaches of Orange and San Diego Counties. * WHEN...Through 11 PM PDT Tuesday. * IMPACTS...Flooding of lots, parks, and roads with isolated road closures expected. Dangerous swimming and surfing conditions and beach erosion. * ADDITIONAL DETAILS...Predicted higher high tides: Newport Beach: Today: 6.2 feet at 7:08 PM. Tuesday: 6.4 feet at 7:59 PM. La Jolla: Today: 6.1 feet at 7:03 PM. Tuesday: High 6.3 feet at 7:54 PM PDT. Recently, actual tide levels have been measured at roughly six inches higher than predicted levels.

* WHAT...Dangerously hot conditions. Afternoon temperatures 102 to 111 expected. Major Heat Risk. * WHERE...In Arizona, Central La Paz and Parker Valley. In California, Chuckwalla Valley and Palo Verde Valley. * WHEN...From 10 AM MST /10 AM PDT/ Wednesday to 8 PM MST /8 PM PDT/ Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke.

* WHAT...Dangerously hot conditions. Afternoon temperatures 106 to 112 expected. Major Heat Risk. * WHERE...Imperial County West and Imperial Valley. * WHEN...From 10 AM Tuesday to 8 PM PDT Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke.

* WHAT...Increased threat of sneaker waves expected. * WHERE...Southwestern Humboldt and Coastal Mendocino Counties. * WHEN...Through Monday evening. . * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These sneaker waves can also move large objects such as logs, crushing anyone caught underneath.