Loudoun County crash knocks out power to thousands amid triple-digit heat wave

A Wednesday car crash in Loudoun County cut power to a vast portion of Dominion Energy customers, leaving thousands of northern Virginia residents facing a grueling night in the scorching heat.

Loudoun County crash knocks out power to thousands amid triple-digit heat wave
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A Wednesday car crash in Loudoun County cut power to a vast portion of Dominion Energy customers, leaving thousands of northern Virginia residents facing a grueling night in the scorching heat.

Montgomery County, Maryland issues 5-day heat emergency for holiday weekend

Montgomery County officials have issued an extended heat emergency warning from Wednesday evening through Monday morning due to a dangerous holiday weekend heat wave.

DMV prepares for extreme heat wave ahead of July 4th holiday
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Extreme heat is here for July 4th weekend. FOX 5's Gwen Tolbart highlights cooling centers in Prince George's County. Plus, our Jennifer Delgado has the latest from the National Mall.

Extreme heat prompts safety warnings ahead of July 4 events in DC region

Extreme heat is moving into the D.C. region just as July 4 celebrations get underway. Here’s how to stay safe, spot signs of heat illness and protect pets and vulnerable neighbors.

DC Weather: Heat wave to bring 100-degree temperatures, heat index near 110
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The D.C. region is facing a stretch of dangerous heat, with temperatures expected to climb into the upper 90s today and 100-degree readings possible Thursday, Friday and Saturday. FOX 5’s Tucker Barnes says the heat index could approach 110 by Thursday and Friday afternoon. A heat advisory is set to take effect late this morning, with mostly dry conditions expected today and tomorrow. A few storms are possible Friday and Saturday, which could bring some relief from the extreme heat.

Heat wave threatens DMV July 4th events; fire officials warn of safety risks

With Fourth of July celebrations just days away, communities across the D.C. region are keeping a close eye on the weather as high temperatures threaten to impact holiday festivities.

Montgomery County rolls out emergency plans for upcoming holiday heat wave
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Officials are preparing for a "quadruple threat" of extreme heat, severe storms, grid strain and packed Independence Day crowds. The county plans to open multiple cooling centers and is urging residents to practice heat safety, check on vulnerable neighbors and protect their pets.

World Cup fans brace for weather phenomenon known as 'heat dome'

A threatening heat dome will engulf the central and eastern U.S. this week with heat index temperatures — which combine air temperature with humidity — soaring into the triple-digits in some areas.

What is a heat dome? How will it impact the DC, Maryland and Virginia region?

If you’ve been outside in the DMV this week, you already know something’s brewing. By Wednesday, that "something" has a name: heat dome. And this one is shaping up to be a doozy, arriving right as the region gears up for a big Fourth of July weekend.

Maryland declares State of Preparedness ahead of dangerous heat wave

Maryland Gov. Wes Moore on Tuesday declared a State of Preparedness ahead of a heat wave expected to bring dangerously hot conditions and extreme heat index values to the state from Wednesday into the Fourth of July holiday weekend.

Extreme Heat Watch, Heat Advisory issued as dangerous conditions grip the DMV

Dangerously hot conditions with extreme heat index values are expected across Washington, D.C., Maryland and northern Virginia from Wednesday into the Fourth of July holiday weekend.

SUMMER WEATHER: Heat Dome Explained
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A heat dome is a ridge of high pressure that traps hot air like a lid on a pot, pushing temperatures roughly 30°F above normal and lingering for days. Instead of letting hot air rise and disperse, the high pressure pushes it back down, compressing and warming it further, while also blocking clouds and storms that might otherwise bring relief. The result: day after day of intensifying heat with little to break the cycle.

What is a heat dome? How will it impact the DC region?
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A heat dome is a ridge of high pressure that traps hot air like a lid on a pot, pushing temperatures roughly 30°F above normal and lingering for days.  Instead of letting hot air rise and disperse, the high pressure pushes it back down, compressing and warming it further, while also blocking clouds and storms that might otherwise bring relief. The result: day after day of intensifying heat with little to break the cycle.

Extreme Heat Watch, Heat Advisories issued as dangerous conditions grip the DMV
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Dangerously hot conditions with extreme heat index values are expected across Washington, D.C., Maryland and northern Virginia from Wednesday through the Fourth of July holiday weekend.

DC's heat dome will bring potentially record-breaking heat for days

As the heat dome begins to take shape over the next few days, temperature records are at risk of being broken nearly every single day.

DC weather forecast: Record-breaking heat wave moves in mid-week
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A massive heat dome is moving east, making for a dangerous heat wave this holiday week in the DMV. Starting Wednesday on, we'll see high to oppressive humidity and temperatures into the low 100s.

America's 250th could be DC's hottest July 4th ever
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The last time Washington, D.C., had temperatures in the hundreds on Independence Day was July 4, 1919. This year, we could break that record and then some, as a heat dome will wreak havoc across the I-95 corridor.

How to stay cool and save on energy as heat dome brings triple-digit temperatures to millions

Temperatures in the 90s are spreading across the Midwest and will reach the East Coast by midweek, when it will feel like 100 to 110 degrees for tens of millions of people ahead of the 4th of July weekend. Here are some tips to stay cool, save on energy, and not break the bank.