 Not as humid with highs in the mid-80s to around 90. Stay with WTOP, Washington's weather station. We'll have your full forecast for you in just a few during traffic and weather on the 8s. Well, just about this time yesterday, more than 100 firefighters were working to put out the apartment fire at a complex in Southeast. Now this afternoon, we're learning what caused that fire. DC Fire and EMS tells WTOP it started when young people were playing with fireworks. They went off on a second-story balcony.