After a few days reprieve, near 100-degree temperatures and high humidity returned to the District July 29.
In the midst of this heat wave, a new study from Stanford University predicts climate change will lead to unusually hot summers becoming the norm over the next few years. Scientists say it's because of an effect beginning in the tropics.
By mid-century, that survey says the world could face unprecedented heat. The coolest summer would be hottest than the hottest summer of the 1900's.
Some scientists have refuted similar claims. But either way, experts says today is a good day to drink fluids and stay indoors where it's cool.