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Values of the heat index around the Washington area at 1:10 pm. Tuesday. (National Weather Service)
(This message, originally issued at 1:49 pm, was updated at 2:30 pm to add information about the excessive heat warning applied.)
* Heat Warning excessive up to 20 hours *
The National Weather Service issued an excessive heat warning for the Washington and Baltimore areas until 8 pm. Tuesday, the most severe heat alert.
"The combination of extreme temperatures and high humidity will create a dangerous situation in which heat-related illnesses are expected," said the Meteorological Service.
At 13:10, the air temperature in Washington climbed to 97 degrees while the dew point, an indicator of humidity, was at 75 degrees. This combination produced a smothering heat index, or a measurement of the heat of the air, of 110 degrees. The weather service issues a heat warning when the heat index values reach 110 or it is predicted that they will rise as high.
The air temperature of 97 and the heat index of 110 early Tuesday afternoon marked the highest levels of the summer of 2018.
] The Meteorological Service advised to inspect parents and neighbors. Seniors and anyone with no access to air conditioning are the most vulnerable to heat-related illnesses. "Take extra precautions if you work or spend time outdoors," he says. "When this is possible, reschedule strenuous activities early in the morning or evening, know the signs and symptoms of heat exhaustion and heat stroke, wear light and loose clothing if possible and drink. a lot of water. "
Tuesday produced the most extreme heat and moisture of the week despite previous forecasts that called Sunday and Monday the hottest days of this heat wave. On Sunday, the high temperature was 93 with maximum heat index values in the low 100s. Monday reached 95 with a heat index as high as 107. Tuesday marked the fifth consecutive day with peaks of at least 90 degrees.
The heat in Washington started early in the day on Tuesday. The low temperature of the morning fell to only 80 degrees, which, if it stands, will mark a record low temperature for the date, pbading the previous mark of 79 from 1898 and 2002.
At 10 pm, the temperature in Washington was the highest in the country on the Weather.com map:
It is unlikely, however, that Washington is setting a record high. The record of 101, last set in 1966 (and before that in 1873 and 1872), should not be reached.
Nevertheless, the heat and humidity caused a lot of discontent among the Washingtonians
"DC" tweeted Naomi Eide .
"Every day I think it's going to be the hottest day, then the next day is worse "] tweeted Nancy Duley .
Wednesday, July 4 should actually show some improvement as the wind blows from the ocean, capping at 90, but it will stay fairly wet, and the heat index values should always be close to 100.
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