California July 30–31 on July 31. In southern California,
Death Valley National Park and the
Mojave National Preserve were impacted by flooding on July 30 and 31, resulting in numerous road and campground closures and damaged/destroyed vehicles. Heavy rain in the
San Bernardino National Forest resulted in mudslides that blocked roads near
Yucaipa.
August 5 All roads into Death Valley National Park were closed due to major flash flooding. Rainfall in Death Valley totaled , setting a new (since surpassed) single-day rainfall record; the amount was around 75 percent of the area's annual average precipitation. After the storm, the
Federal Highway Administration gave $11.7 million to the
National Park Service to fix roads in the park following the flooding.
Las Vegas Valley July 28 On the night of July 28, another flash flooding event occurred in the
Las Vegas Valley in southern
Nevada.
Harry Reid International Airport saw of rainfall in two hours, the monthly average for all of July. A ground stop was issued at the airport. Parts of
Clark County saw of rain, causing disruptive flash flooding. Just one mile away from the airport, the
UNLV campus received substantially more rainfall, totaling over . Casinos on the Strip that were impacted included
Caesars Palace and
Planet Hollywood, with water pouring through parts of the ceilings into the buildings.
Las Vegas Boulevard and Main Street, especially in downtown and the area of the Strip, were covered in water, creating traffic problems. Fire departments and first responders had 330 calls for flooding and swift water service, with seven people being rescued from floodwaters. The seasonal monsoon rains in the area partially contributed to a water rise of in
Lake Mead from July 26 to 31, along with water releases from
Lake Powell.
Arizona July 25–30 Rain beginning on July 25 in the
Flagstaff, Arizona area associated with the monsoon season led to increased flash flooding concerns throughout the week, due in part to the burn scars from the
recent wildfires. By July 27, Flagstaff mayor Paul Deasy had declared a state of emergency as numerous areas around Flagstaff had been impacted by flooding, including Mt. Elden Estates, Paradise, Grandview, and Sunnyside. Other neighborhoods such as Cheshire, Coconino Estates, Creighton Estates, Coyote Springs, Anasazi Ridge were later added to the state of emergency order. Schultz Creek overflowed in the area, resulting in the temporary closure of
US 180 on the west side of Flagstaff. On July 30, areas on the north side of
Phoenix along
I-17 received of rain, mostly within one hour. This led to flooding of roads and low-lying areas and prompted four water rescues, two of which were from partially submerged vehicles. A voting precinct in
Downtown Phoenix was closed by the Maricopa County Elections Department due to flooding in the building, forcing it to be relocated elsewhere within the building for subsequent days. Numerous streets in Phoenix became temporarily flooded due to the heavy rain. Several homes and apartment complexes became flooded as well.
Utah August 19 One woman was killed when she was swept away in a flash flood in
Zion National Park. Her body was discovered on August 22 after a search involving over 170 people.
Texas August 21–22 Starting late on August 21, 2022, and going into the next morning, a significant flash flooding event occurred in the
Dallas–Fort Worth metroplex in
Texas, killing one person and injuring four others. On the morning of August 21, the
Weather Prediction Center (WPC) issued a moderate risk for excessive rainfall for
North and
Northeast Texas. On August 22, WPC issued a new moderate risk for excessive rainfall for North and Northeast Texas as well as portions of
North Louisiana. At 1:20 am. CDT on August 22, the
National Weather Service issued a
flash flood warning for the Dallas metroplex. Overnight on August 21,
Dallas Fort Worth International Airport reported of rainfall over a one-hour timeframe, setting the record for the most rainfall in a single hour ever for the airport. By 8 am. CDT on August 22, parts of the
Dallas–Fort Worth metroplex had received over of rain. The amount of rainfall that Dallas normally sees during all of summer fell within 24 hours, breaking a record for most rain in 24 hours since 1932 and making 2022 the wettest August in Dallas history. This also meant that, despite 67 consecutive days with no measurable precipitation during the summer, Dallas still had their 9th wettest summer on record. The flooding event caused over 314 car crashes and 319 high water calls. Parts of the Dallas area got up to of rain.
Dallas Fort Worth International Airport, and 37,000 other customers, lost power. One person was killed and four people were injured in the floods. Certain rivers reached moderate flood stage as they reached over . Around 10:15 am. CDT on August 22, the storms associated with the flooding event produced an EF1 tornado that impacted
Smith County, approximately east of downtown Dallas. Minimal damage occurred to a school and other structures near
Winona. Due to the floods, drought improved across parts of northern Texas.
Mississippi August 2 Areas near
Canton, Mississippi also received very heavy rainfall on August 2, leading to flash flooding that trapped people in homes in
Madison County. Numerous people were rescued by fire department crews from houses and offices after some areas received up to of rainfall in a few hours. Roads were closed due to high water, and vehicles were submerged along roadways and in parking lots.
August 24–27 Parts of Central Mississippi received very heavy rainfall starting on August 24. Flash flood emergencies were declared, and up to of rain fell. This led to severe effects on water systems near Jackson, leaving many residents without clean drinking water. At one point, the city temporarily ran out of bottled water to give to residents. During the storm, parts of
I-20 closed. These floods contributed largely toward August 2022 becoming the wettest August on record for
Mississippi.
St. Louis area July 26 Missouri in St. Louis, for the historic flash floods. 30 miles (48 km) of
I-70 were closed because of the floods, with some vehicles completely submerged. Flood damage to the
MetroLink light rail transit system in St. Louis was estimated at $18–20 million. In St. Peters, ten puppies at an animal rescue shelter died in the flooding. Dardenne Creek in St. Peters rose over into major flood stage over the span of seven hours. This included in just six hours. Over 20,000 residents lost power.
Western Illinois Flash flooding extended into Illinois along the
I-64 corridor in
St. Clair County, and a nursing home was evacuated in
Caseyville. In
Belleville, which received approximately of rain, multiple roadways were closed due to high water, with a section of one street being washed away. Residents were assisted from two houses in town, and city parks sustained damage to parking lots, playgrounds, and bathrooms.
Cahokia Heights had 15 to 20 homes with flood damage, along with more flooded streets, and Caseyville had a levee breach, leading to the evacuation of the nursing home. Other areas, such as
East St. Louis and
Swansea, had more flooded homes, while more communities escaped with only minor roadway flooding.
Central and eastern Illinois August 2 Parts of central Illinois received very heavy rainfall from the evening of August 1 into August 2. Numerous counties were impacted by flooding, with flooding reported near the cities of
Decatur,
Dawson,
Spaulding, and
Barclay. In downtown Decatur, numerous roadways were flooded, leaving vehicles submerged. Parts of
Jasper and
Richland counties received the most rainfall from the event, totaling , with rainfall rates reaching per hour. after what was described as a thousand-year flooding event. The Kentucky Court of Justice closed the judicial centers in
Floyd, Letcher,
Magoffin, and Perry counties due to the extreme flooding. The storms dumped up to of rain on parts of the state. Kentucky cities severely affected by the floods include
Hazard,
Jackson,
Paintsville,
Prestonsburg,
Martin,
Pikeville,
Hindman,
Whitesburg,
Fleming-Neon, and
Jenkins. Many roads were shut down in these areas, including Main Street in Hazard, Mayo Trail in Pikeville,
KY 317 in Fleming-Neon, and Lakeside Drive and Main Street in Jenkins. Evacuations were ordered in the downtown areas of cities that were severely flooded including Hazard, Fleming-Neon, Jenkins, and Martin. The
North Fork of the Kentucky River set record high crests in Whitesburg and Jackson, Late on July 28 and into July 29, part of the city of Jackson was evacuated and
KY 15 was closed after officials became concerned that water from the
North Fork River would top Panbowl Dam along KY 15 and potentially flood approximately 110 homes, 13 businesses, and other structures around Panbowl Lake, although the river began receding before the dam was overtopped. The North Fork River set a record crest in Jackson of , besting the previous record of from February 4, 1939, while meteorologists at the
National Weather Service forecast office in Jackson became trapped at the office due to nearby high water. The rainfall observed over the region during the period of July 25–30 was over 600 percent of normal totals. The four-day rainfall totals of in some areas were reported to have a less than a 0.1 percent chance of occurring in any given year.
July 31 – August 1 More rainfall over waterlogged areas led to more flooding on August 1 in Knott and Letcher counties. Downtown areas of Hindman and Fleming-Neon were again inundated by floodwaters in the early hours of August 1. KY 550 was again flooded in Knott County, affecting the communities of
Mousie and
Fisty, along with Hindman. Flooding was also reported in other areas such as Floyd County, Pike County, and
Harlan County. Roads in Floyd County were flooded or blocked by downed trees and power lines. As a result of flooding on July 28 and again on August 1, Fleming-Neon was left with its city hall, bank, pharmacy, and post office flooded, with more than a foot of mud covering the inside of the city hall building.
Virginia South Fork Road, South Mountain Road, Bold Camp Road, and Main Street in
Pound, Virginia and portions of
US 23 in
Wise, Virginia were shut down in Virginia. Evacuations were ordered in the downtown areas of cities that were severely flooded, including Pound and
Clintwood, Virginia. More flooding occurred in nearby
McDowell County as well, in addition to other areas. This, combined with additional rainfall and flooding on July 28, led to a state of emergency being declared by Governor
Jim Justice for six counties: Mingo, McDowell,
Fayette,
Greenbrier,
Logan, and
Wyoming. Partly as a result of the flooding,
Huntington, West Virginia recorded their wettest July on record with of rain. ==Aftermath==