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Heat, humidity and vacations to define July 4 week

AccuWeather meteorologist Tom Kines wouldn't commit to what the hottest day would be in the next week.

"I'm not sure it makes much of a difference whether it is 99 or 96 out," he said. "I don't think it makes much of a difference."

The Mid-Atlantic is embroiled in yet another extended summer heat wave, one where temperatures could approach 100 today.

High temperatures should be at 90 degrees or greater every day through July 4, according to the National Weather Service, as many prepare for Independence Day vacations.

A by-the-numbers look at the heat, humidity and possible getaways to escape it:

The weather: By the numbers

34: The number of heat-related deaths in May and August in Maryland.

50: The threshold for the Air Quality Index where it may pose a moderate health risk, especially for those who are sensitive to air pollution. That threshold is likely to be crossed today, according to Clean Air Partners.

67: The record number of 90-degree days in one summer in Washington, which was set in 1980 and 2010.

70: The record low maximum temperature for today at Baltimore-Washington Thurgood Marshall International Airport, set in 1970.

94: The projected high temperature for Carroll today, according to the National Weather Service. It is also the projected high for July 4.

103: The record-high temperature for today at BWI Airport, which was set in 1901.

105: What the heat index needs to be in order for the Maryland Department of Health and Mental Hygiene to activate the state's Heat Plan. It is activated for today.

107: The record-high temperature for the month of July at BWI Airport, which was set July 10, 1936.

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July 4 getaways: By the numbers

74: The Atlantic Ocean water temperature in Ocean City as of Thursday, according to the National Weather Service.

$2.91: The average price of a gallon of gasoline in South Carolina as of Thursday, according to http://www.southcarolinagasprices.com.

$3.34: The average price of a gallon of gas in Maryland as of Thursday, according to Triple A. That's 30 cents per gallon cheaper than this time last year, AAA spokeswoman Ragina Averella said.

86: The percentage of Marylanders who are traveling that are planning to use area roads.

311,000: The number of people estimated in Ocean City on July 4 in 2007, the last time Independence Day was held on Wednesday, according to Ocean City tourism spokeswoman Donna Abbott.

354,000: The number of people estimated in Ocean City last year for July 4, Abbott said.

846,000: The number of Marylanders planning to travel 50 miles or more for the Fourth of July from Tuesday through July 8, according to a survey by Triple A. That's a 5.3 percent increase from last year.

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