Four people in critical condition following lightning strike in DC.

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5. The National Weather Service issued a severe thunderstorm warning

for much of the Beltway area between 6:30 and 7:15 p.m., cautioning of the threat of damaging wind gusts up to 60 mph and quarter-size hail.

Chris Vagasky, an analyst for Vaisala, which operates a national lightning network, said in a message that there was a “6 stroke flash near the White House that hit the same point on the ground” at 6:49 p.m. He explained that means six individual surges of electricity hit the same point on the ground within half a second.