Philly broke a 150-year-old record with 30 straight days without measurable rain. How does that affect fall foliage?

The record for longest streak of dry days in Philadelphia was broken Tuesday, when the city reached its 30th consecutive day without measurable precipitation. The dry spell comes as the state's fall foliage peaks. An expert said dry weather can cause the leaves' color-changing process to speed up, but the foliage is expected to continue for at least another week.