Dense fog and a thick marine layer have shielded the sun along San Diego's immediate coast for the last few days, but it's a completely different story just a few miles inland.

The National Weather Service is forecasting hot and unseasonably warm temperatures for inland areas of San Diego County, continuing into early next week.

The National Weather Service issued an excessive heat warning for the deserts and inland valley communities, including El Cajon Poway Santee, La Mesa, San Marcos and Escondido from 10 a.m. Tuesday through Monday.