Hot and Humid Streak Officially a Heat Wave, But Thunder and Colder Air on the Way

From the NBC10 Boston First Alert Weather Center… Today (Friday): Hot, humid, chance late & evening thunder. Highs 90-95, heat index around 100. Overnight Friday Night: Chance shower/thunder, especially west. Lows in the 70s. Saturday: Scattered AM shower, PM storms. Highs near 90, heat index 90-95. Sunday: Delightful air, sun through clouds. Highs near 80.