Southern California’s weather is expected to continue heating up on Tuesday, with temperatures approaching 100 degrees in San Diego’s inland valleys, according to the latest forecast from the National Weather Service‘s local office. On Tuesday morning, “patchy dense fog could make travel hazardous” along the coast, according to the weather service. Then temperatures will begin to heat up. “The heat will be on again today as high pressure aloft peaks in strength over the southwest states,” the weather service said.