Over 55 million Americans at risk for flash flooding this weekend - ABC News

Meanwhile, in the West, a heat wave persists across parts of the region,

July 17, 2021, 2:03 PM

• 7 min read

Over 55 million Americans are at risk for flash flooding this weekend as severe weather heads toward the Northeast.

Portions of the Northeast are nearly five times wetter than average for July so far. New York and Boston both could approach all-time wettest July before the month's end.

A train lays derailed near Lund, Utah,, July 15, 2021. Three workers on a freight train were injured when it derailed while crossing tracks covered with water in a remote part of southern Utah Thursday night, authorities said. The train, which had nearly 100 cars, tipped on its side after derailing near Lund, about 85 miles from the Nevada border. (Iron County Sheriff's Dept. via AP)

Tornadoes and damaging winds are also possible in the Northeast today.

A slow moving frontal system is bringing very heavy rain from the central U.S. to the East Coast. Over 3 inches of rain caused flash flooding in the Detroit region on Friday. Over 5 inches of rain was reported in Indiana, nearly 6 inches of rain was reported in Illinois, and over 10 inches of rain was reported in Kansas.

Flash flood watches are in effect from Indiana to Massachusetts. The rainfall threat across parts of the northeast is particularly concerning. The region is well above average for rainfall.

The system is moving east this morning and will bring more heavy rain to parts of the Ohio Valley and ultimately into the Northeast. Severe storms, including the risk for possible tornadoes and damaging winds will be possible from Maryland to New York today, including Philadelphia and New York City.

Flash flood watches are in effect from Indiana to Massachusetts. The rainfall threat across parts of the Northeast is particularly concerning. The region is well above average for rainfall.

Severe storms, including the risk for possible tornadoes and damaging winds will be possible from Maryland to New York today, including Philadelphia and New York City.

New York City has had 8.49 inches of rain so far for the month of July. To put that in context, New York City's average rainfall for all of July is 4.60 inches. The wettest July on record in New York city is 11.89 inches.

Boston has had 8.92 inches of rain so far in July. Boston currently is having it’s third-wettest July on record. The wettest July on record in Boston is 11.69 inches.

The precipitation forecast for storms Saturday and Sunday shows locally over 3 inches of rain. While not a certainty, it is looking possible, that Northeast cities will be approaching or exceeding their wettest July on record -- and that may happen this weekend, in spots.

Firefighters rescue a man and two young girls who were stranded after their vehicle was washed away in flash floods near Tucson, Ariz., July 14, 2021.

Flash flooding is a concern. As the ground is very saturated, the heavy rain will likely cause flash flooding very quickly.

Meanwhile, in the West, a heat wave is persisting across parts of the region, but it is not nearly as bad as the last few heat waves have been. In fact, there are only a couple of records being threatened over the next few days.

A semi-trailer drives through a flooded street in Detroit, July 16, 2021.

More concerning is the risk of dry lightning across California and Western Nevada on Sunday night. Dry lightning can quickly start wildfires, that will quickly burn out of control.

Additionally, more monsoon-related flooding will be possible across Arizona and New Mexico.

n the west, a heat wave is persisting across parts of the region, but it is not nearly as bad as the last few heat waves have been. In fact there are only a couple of record being threatened over the next few days. More concerning is the risk of dry lightning across California and Western Nevada on Sunday night. Dry lightning can quickly start wildfires, that will quickly burn out of control.

Here are the updated fire numbers:

Beckwourth Complex Fire
Size: 105,163 acres
70% contained
Near Beckwourth, CA

Bootleg Firebr />Size: 273,582 acres
22% contained
Near Beatty, OR

River Fire
9,500 acres
59% contained
Mariposa County, CA

Snake River Complex Fire
102,866 acres
31% contained
Outside of Lewiston, ID

Red Apple Fire
11,111 acres
51% contained
Central Washington

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