Heat Wave Forces Cancellation of July 4 Parades and Fireworks Across Eastern U.S.
A dangerous heat wave disrupted Fourth of July events across the central and eastern United States on Friday, forcing cancellation of parades, concerts and fireworks displays while straining power grids, as severe thunderstorms triggered flash flood and flood warnings in parts of Iowa, Kentucky and Illinois.
Heat Wave Cancels July 4 Events in Washington and Eastern U.S.
A dangerous heat wave upended Fourth of July celebrations across swaths of the central and eastern U.S. on Friday, forcing officials in the nation’s capital and elsewhere to cancel or postpone dozens of parades, concerts and fireworks displays. [4] Among the events disrupted by the sweltering heat was the Great American State Fair on the National Mall in Washington, a centerpiece of President Donald Trump’s efforts to mark the nation’s 250th birthday. [4] The fair, designed to showcase all 50 states, was temporarily closed on Friday afternoon as temperatures reached 101 degrees Fahrenheit. [4] Late on Friday, organizers of the National Park Service’s Independence Day Parade in Washington announced they had canceled the annual event due to safety concerns. [4] The parade had been scheduled to start at 10:30 ET on Saturday, with the Weather Service projecting heat index values to reach as high as 115 degrees Fahrenheit. [4] Event cancellations were reported across the Eastern Seaboard for the July 4 weekend, when Americans typically gather for barbecues, parades and fireworks displays to celebrate the nation’s 1776 Declaration of Independence from Britain. [4] In Philadelphia, officials canceled the Salute to Independence Parade, a marquee event in the city’s celebrations, citing extreme heat. [4] The decision came after temperatures hit 103 F on Thursday, tying a record high last seen in 1901. [4] Elsewhere, heat-related disruptions rippled across the region. [4] Haddon Township, New Jersey, canceled its annual July 4 parade. [4] Watertown in upstate New York called off its Independence Day concert and fireworks display. [4] In Boston, officials delayed entry to an annual riverside fireworks celebration by four hours, to 4 p.m. instead of noon. [4]
Record Temperatures and Health Warnings
Record-breaking temperatures spread to the eastern U.S. from the Midwest earlier this week due to the emergence of a high-pressure system known as a “heat dome,” which traps a mass of hot air over a region and can cause humidity to spike. [4] Over 185 million people, more than half the U.S. population, were under heat alerts on Friday, the National Weather Service said. [4] Peak heat indexes could reach 115 F in parts of the country, with several cities setting record temperature highs. [4] Forecasters and government officials have warned that the heat wave could prove deadly. [4] They urged Americans spending the long weekend outdoors to stay hydrated, seek shade and watch for signs of heat illness at gatherings and public events. [4] In New York City, shoe soles stuck to Manhattan streets as adhesives softened in the heat. [4] The city’s extreme heat warning did not stop fans from gathering on sweltering sidewalks to watch celebrity guests arrive at Madison Square Garden for what was widely expected to be the wedding celebration of pop megastar Taylor Swift and football hero Travis Kelce. [4] A worker waved SUVs carrying guests into the venue while holding a water bottle in one hand and a towel to wipe sweat from his face in the other. [4]
Power Grid Strains and Outages
The scorching conditions also strained power grids. [4] PJM, the largest U.S. power grid operator serving 67 million people in the Mid-Atlantic, South and Washington, D.C., areas, ordered customers enrolled in emergency conservation programs to curb usage. [4] The steps were needed to battle generator outages, overloaded transmission lines and a surge in air-conditioning demand due to the heat. [4] In New York, Con Edison said roughly 17,000 customers were without power as of late Friday afternoon. [4] As demand surged, it urged customers in New York City and Westchester County to conserve electricity. [4]
Flash Flooding Hits Kentucky from Heavy Thunderstorms
At 714 AM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area in Laurel, Kentucky. [2] Between 1.5 and 2.5 inches of rain have fallen since 6 AM across the hardest hit areas. [2] Additional rainfall amounts of 0.5 to 1 inch are possible in the warned area through 8 AM. [2] Flash flooding is ongoing or expected to begin shortly. [2] Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses is the impact from the hazard caused by thunderstorms. [2]
Flood Warnings Continue in Illinois and Iowa
Flooding caused by excessive rainfall is expected in a portion of central Iowa, including the following counties: Boone, Jasper, Marshall, Polk and Story. [1] The warning remains in effect until 6:15 PM CDT Saturday. [1] Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. [1] Streams continue to rise due to excess runoff from earlier rainfall. [1] At 6:19 AM CDT, Doppler radar indicated heavy rain due to thunderstorms. [1] Minor flooding is occurring and minor flooding is forecast for Thorn Creek from near Glenwood downstream to confluence with Little Calumet River, including the Thornton gauge, affecting Cook County, Illinois. [3] Minor flooding is forecast until late tomorrow evening. [3]
Severe Thunderstorm Moves Through Eastern Iowa
At 5:09 AM CDT, a severe thunderstorm was located over Buchanan, or near Tipton, moving northeast at 40 mph. [5] Hazards include 60 mph wind gusts and penny size hail. [5] The source is radar indicated. [5] Expect damage to roofs, siding, and trees. [5] Locations impacted include Iowa City, Tipton, West Branch, Mechanicsville, Stanwood, Mount Vernon, Lisbon, Rochester, Buchanan, Clarence, Newport, Springdale, Cedar Valley, Cedar Bluff, Oasis, Sutliff, Elmira, Cedar Valley Park, Morse, and Herbert Hoover National Historic Site. [5]
What to watch next: The flood warning for central Iowa counties remains in effect until 6:15 PM CDT Saturday, while minor flooding along Thorn Creek in Cook County, Illinois, is forecast until late Saturday evening.
