* WHAT. High temperatures in the 90s to 102 expected. Low temperatures in the mid 60s to lower 70s. * WHERE. San Diego County Mountains. * WHEN. Until 8 PM PDT Thursday. * IMPACTS. Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS. A few degrees of cooling is possible Friday, but temperatures will remain well above average through the upcoming weekend.

* WHAT. Dangerously hot conditions with temperatures from 108 to 115 expected. Low temperatures in the mid 70s to around 90 expected. * WHERE. Coachella Valley and San Diego County Deserts. * WHEN. Until 8 PM PDT Thursday. * IMPACTS. Heat related illnesses increase significantly during extreme heat events. Warm overnight temperatures will lead to less relief from the heat, prolonging impacts. * ADDITIONAL DETAILS. Well above average temperatures will continue through the weekend.

* WHAT. Dangerously hot conditions with temperatures from 108 to 115 expected. Low temperatures in the mid 70s to around 90 expected. * WHERE. Coachella Valley and San Diego County Deserts. * WHEN. Until 8 PM PDT Thursday. * IMPACTS. Heat related illnesses increase significantly during extreme heat events. Warm overnight temperatures will lead to less relief from the heat, prolonging impacts. * ADDITIONAL DETAILS. Well above average temperatures will continue through the weekend.

* WHAT. High temperatures in the 90s to 102 expected. Low temperatures in the mid 60s to lower 70s. * WHERE. San Diego County Mountains. * WHEN. Until 8 PM PDT Thursday. * IMPACTS. Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS. A few degrees of cooling is possible Friday, but temperatures will remain well above average through the upcoming weekend.

The National Weather Service in Phoenix has issued a * Dust Advisory for. Southwestern La Paz County in west central Arizona. Northern Yuma County in southwestern Arizona. Eastern Imperial County in southeastern California. * Until 1030 PM MST/1030 PM PDT/. * At 933 PM MST/933 PM PDT/, a wall of dust was along a line extending from near Ligurta to 11 miles northeast of Kinter to 18 miles northwest of Tyson to 24 miles southeast of Kofa Wildlife Refuge, moving northwest at 30 mph. HAZARD. Less than three miles visibility with strong wind in excess of 30 mph. SOURCE. Doppler radar. IMPACT. Hazardous travel. * This includes the following highways. AZ Interstate 8 between mile markers 21 and 38. AZ Route 95 between mile markers 38 and 91. Locations impacted include. Martinez Lake, Wellton, Kinter, Ligurta, Yuma Proving Ground, Palm Canyon, and Roll.