It’s hot out there and only getting hotter. The Capital Weather Gang forecast calls for blistering, stifling heat this afternoon and evening, with the heat index potentially peaking in the neighborhood of 100 to 105 degrees.

Dr. Gridlock already offered his tips for riding the Metro during the hottest days of the year, and you should definitely give those a look if you’re a Metro commuter. (Metro announced that riders can carry and drink water throughout the system Wednesday and Thursday due to the extreme heat.)

Commuter rail passengers should also be prepared. The Virginia Railway Express reports that heat-related speed restrictions are going to be in effect on the Fredericksburg Line on Wednesday afternoon; as a result, southbound trains are going to be delayed.

MARC riders should expect similar speed restrictions, according to the Maryland Transit Administration. The heat orders reduce the maximum speed of trains on the Brunswick and Camden lines. Again, this could lead to delays.

This should go without saying, but be careful today. Drink lots of water and don’t rush to make a train or a bus.