steve rudin? >> i am not keen on the hot and humid weather events on the way for the next couple days. for this afternoon, temperatures expected around 92-97, heat index reading around 100 degrees. nighttime lows in the '70s. tomorrow, even hotter, 95-100, heat index readings to 1005. chance of strong thunderstorms wednesday. -- heat index readings to 100 tomorrow. >> several lawmakers will announce the first ever federal safety standards for rail transit systems nationwide, including metro. the new safety standards are somewhat based on recommendations from the ntsb. the national transportation safety board recommendations include a minimum crash standards and improved evacuation plans and rescue features as well as requirements that all metro trains carry data recorders. metro officials are hoping for a smooth morning commute right now. >> this is after crazy weekend. twice this weekend computer glitches shutdown the metro system. there are back up plans in place. john gonzalez joins us outside the mount vernon square station with more on metro's proactive approach to making sure the