Moderate

Some patchy dense fog will restrict visibilities to one-half to one-quarter of a mile across parts of north Georgia. The fog should lift after 10 AM. If driving this morning, slow down, use low-beam headlights and leave extra distance between you and the vehicle in front of you.

* WHAT...High temperatures up to 102 degrees expected. Overnight lows between 70 and 75 degrees expected in the Sierra Foothills where the thermal belt is strongest. * WHERE...San Joaquin Valley, Sierra Nevada foothills, and Coastal West Hills. * WHEN...Until 11 PM PDT Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Moderate to major risk of heat-related illnesses for much of the population, especially those without effective cooling or hydration.

* WHAT...Minor coastal flooding and dangerous rip currents expected due to the combination of high tides and elevated surf. * WHERE...San Diego and Orange County Coastal Areas. * WHEN...From Tuesday afternoon through Friday evening. * IMPACTS...Minor coastal flooding and minor coastal erosion is possible during high tides, most likely during the evenings. * ADDITIONAL DETAILS...Elevated surf of 3-5 feet on south and southwest-facing beaches. High tides are expected to peak between 6.5 and 7.0 feet during the evenings.

Localized dense fog with visibilities dropping below one-quarter of a mile has developed. The fog is patchy, so sudden drops in visibilities when traveling our expected. Motorists should use extreme caution when driving this morning. Reduce speed, leave extra travel time and following distance, and use low beam headlights.

* WHAT...Dangerous rip currents expected. * WHERE...Northeast Florida Beaches. * WHEN...From Tuesday afternoon through late Wednesday night. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.

* WHAT...Dangerous rip currents expected. * WHERE...Southeast Georgia Beaches. * WHEN...From Tuesday morning through late Wednesday night. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.

Patchy to areas of fog have developed across portions of the area this morning. In some locations, the fog will become locally dense and reduce visibility to one-quarter mile or less at times. These conditions may persist until shortly after sunrise. Slow down, use low beam headlights, and allow for extra distance between yourself and other motorists if encountering fog during the morning commute.

* WHAT...Dangerous rip currents. * WHERE...Kenedy Island, Willacy Island and Cameron Island Counties. * WHEN...Through this evening. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.

Patchy dense fog has formed across the area south of I-70. Some areas may see visibilities falling to one- quarter mile or less. Fog will last into the morning commute. Slow down, use low beam headlights, and keep extra distance between your vehicle and other vehicles. Fog will begin to dissipate by about 9 AM EDT this morning.

Pockets of dense fog have developed across parts of eastern Kentucky early this morning, with visibility reduced to below one-quarter mile in some locations. These conditions may persist until near or shortly after sunrise before the fog begins to lift or burn off. You should expect to encounter sharp reductions in visibility if traveling through the remainder of the overnight. Use low-beam headlights, allow yourself extra time to reach your destination,