Monday will bring little relief with temperatures expected to hit a high of 98 degrees, according to the weather service. The heat index should approach 100 on Friday afternoon and could get as high at 110 on Saturday afternoon.
Heading through next week, meteorologists say the trend in the forecast guidance continues to be for the ridge to maintain its strength over the area, prolonging the heat and humidity and limiting chances for showers and storms.
Rain is possible again Sunday, when things cool down a bit.
For the Northeast, heat will build into the weekend, with temperatures well into the 90s into next week.
The National Weather Service has issued heat advisory, which means that "hot temperatures and high humidity will combine to create a situation in which heat illnesses are possible". Drink plenty of water and have places to go where you can cool off, preferably somewhere with A/C. Air-conditioning will be the best resource to stay cool tomorrow and Sunday.
Philadelphia, which hit 92 degrees on Sunday with a heat index of 105, similarly sounded the alarm to its residents and visitors about the unsafe heat. However, an excessive heat watch runs through Monday evening.
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Temperatures in Washington D.C. are slated to hit the low to mid-90s, according to the weather service.
Heat indices that high can cause heat stroke and death for anyone outside too long.
For the 4th of July, we could see a few showers/storms in the morning along the southern coast, but the bulk of the day will be dry.
Sleeping will be extremely hard without air conditioning as heat from the pavement will be ruthless, USA Today reports.
The normal high for much of July is around 90°.
SATURDAY - Sunny, Hot and humid, Heat Index 100+.
A chance of a thunderstorm is expected sometime late Tuesday night into Wednesday, Simpson said.