After a fiery Friday and an expected sizzling Saturday, D.C. is reminding residents and visitors heading to the National Mall聽for the to be prepared.
“People should not underestimate the heat,” said Christopher Rodriguez, director of the D.C. Homeland Security and Emergency Management Agency.
The National Weather Service issued an excessive heat warning Friday, and that warning returns Saturday from 11 a.m. to 9 p.m. The extreme conditions are expected to stretch into Sunday.
Friday’s excessive heat warning lasts until 9 p.m., but even when night falls, the area will only cool off into the mid-70s and low 80s.
By Saturday morning, around 7-8 a.m., Storm Team 4 meteorologist Amelia Draper said it will already feel like 90 degrees, likely climbing into the triple digits by lunchtime.
Periods of high heat and humidity can cause medical problems, such as heat exhaustion and stroke.
“We want to make sure that the folks who come out for that event are properly hydrated,” Rodriguez said. “We’ll work with the Park Police to distribute water, and we’ll be on the lookout for anyone who might be suffering from heat exhaustion.”
Rodriguez said his agency will work to ensure that people know where to go if they are feeling the effects of the heat and need to cool off.
“This is going to be a pretty severe weather event, so we want to make sure people are aware of that and don’t take that for granted,” he said.
The festival kicked off Thursday between 4th and 7th streets, and returns from 9 a.m. to 8 p.m. Saturday. The festival is in addition to the Friday night and Saturday night 17-minute film that recreates the Apollo 11 launch.
Here’s what to expect Saturday for the stage at the outdoor celebration of the first moon landing, according to the Smithsonian:
Saturday, July 20
- 10 a.m.: Ready Jet Go! performance
- 11 a.m.: 鈥淪pace Journalism: From Apollo to the Future,鈥 featuring Emre Kelly, Florida Today; Ray Soto, USA Today, and Dr. Teasel Muir-Harmony, National Air and Space Museum
- 11:30 a.m.: 鈥淧roject Egress鈥 discussion, featuring Adam Savage
- 12 p.m.: 鈥淔rozen Water in the Lunar Craters鈥 with NASA鈥檚 Dr. Jim Green
- 12:30 p.m.: 鈥淏enefits of the International Space Station,鈥 featuring NASA鈥檚 Dr. Tara Rutley
- 1 p.m.: 鈥淟unar Science,鈥 presented by NASA鈥檚 Dr. Barbara Cohen
- 1:30 p.m.: 鈥淔rom Moon Rocks to Mars Rocks: Lessons from Apollo for the Red Planet,鈥 featuring NASA鈥檚 Dr. David Beaty
- 2 p.m.: 鈥淓arth Science from Space,鈥 presented by Sandra Cauffman
- 2:30 p.m.: 鈥淎 Day in the Life of a Space Engineer鈥 panel, presented by Raytheon
- 3 p.m.: Ready Jet Go! Performance
- 4 p.m.: 鈥淧lanetary Exploration,鈥 featuring NASA鈥檚 Bobak Ferdowsi and the Museum鈥檚 Dr. Emily Martin
- 4:30 p.m.: 鈥淎pollo 50: Go for the Moon鈥 panel about the Museum鈥檚 Saturn V projection
- 5 p.m.: LEGO 鈥淩ocket Building Challenge鈥 Awards Ceremony
- 5:30 p.m.: Museum programming
- 6 p.m.: Ready Jet Go! performance
- 7 p.m.: Museum programming
D.C. Mayor Muriel Bowser has activated the District’s , opening cooling centers, and extending service hours for low-barrier shelters and select outdoor pools and splash parks.
“Residents needing a cool place to be are encouraged to utilize any library or recreation center,” the mayor’s office said in a statement. “Residents and visitors should take extra steps to beat the heat by staying in the shade or air-conditioning, drinking plenty of water and visiting a cooling center.”

