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Northeast
Flash Flood-Weary Northeast Gets a Brief Sunday Respite — But New Storm Threat Looms by Nightfall
After a brutal week of repeated flooding events across New England and the Mid-Atlantic — including episodes that dumped five or more inches in parts of western Massachusetts, Connecticut, and northern New Jersey — Sunday brings a temporary improvement as a drying trend pushes into the region ahead of a weekend high-pressure ridge.
Temperatures across greater Boston, New York City, and Philadelphia will settle into the pleasant upper 70s to low 80s, with lower humidity offering welcome relief after days of oppressive conditions. The good news, however, is short-lived: Fox Weather is tracking a new round of slow-moving thunderstorms that could re-engage the flood threat along the I-95 corridor by late Sunday evening, with level 1 of 4 flash flood risk already in place heading into Sunday night across portions of Pennsylvania, western New York, and southern New England.
Soils remain heavily saturated, meaning even modest rainfall totals can produce rapid runoff and urban flooding. Residents from Pittsburgh to Buffalo to Syracuse should monitor forecasts closely ahead of the overnight hours.
Sources: NWS Weather Prediction Center · Fox Weather · Boston Globe
Mid-Atlantic & East Coast
Calmer Sunday Across the Mid-Atlantic as Saturday's Severe Threat Exits — Heat and Humidity Rebuild Into Next Week
The active weather pattern that brought damaging winds, large hail, and isolated tornado reports to portions of Maryland, Delaware, and the Carolinas on Saturday is pushing offshore as of Sunday morning, leaving behind a mostly sunny and relatively comfortable afternoon for cities including Baltimore, Washington, Richmond, and Charlotte. Highs will reach the upper 80s to low 90s — seasonable for early August — before humidity climbs again Monday.
The remnant moisture tied to the prior stretch of flooding rainfall that soaked the Carolinas and Virginia coast this week will keep stream levels elevated and some localized flood advisories active through the first half of Sunday. Raleigh and the Piedmont should see mostly clear afternoon skies, while the North Carolina coast and Outer Banks remain under a moderate rip current advisory as swells linger from a broad area of low pressure well offshore.
The SPC is not highlighting any severe threat for the Mid-Atlantic on Sunday — a quiet day by recent standards.
Sources: NWS Storm Prediction Center · Weather.com · Fox Weather
Florida
South Florida's Sunday Cycle: Hot Sun, Steamy Low 90s, and Mid-Afternoon Thunderstorms Along the East Coast Metro
Florida's weather machine is running on its standard August script again Sunday, with mostly sunny skies giving way to scattered thunderstorms across the east coast metro areas of Miami-Dade, Broward, and Palm Beach counties during the peak afternoon heating hours.
South Florida Reporter notes that Sunday highs will reach the low 90s along the east coast metro and near 90 degrees along the Gulf Coast and in the Keys — numbers that, when combined with dew points near 80°F, will push heat index values well into the upper 90s and potentially over 100°F for parts of the interior.
The Gulf Coast will see some sunshine with more cloud cover and gusty afternoon storms driven by a breezy onshore flow. The tropical Atlantic remains relatively quiet, with no active organized systems threatening the state, though forecasters are noting an increase in low- to mid-level moisture that could complicate the pattern heading into next week.
Residents in low-lying areas should remain alert for localized urban flooding wherever storms stall.
Sources: NWS Miami · South Florida Reporter · NWS Tampa Bay
Southeast
Gulf Coast Cold Front Produces Scattered Storms Sunday — Drier Air Expected Early Next Week From Mobile to New Orleans
An early August cold front is pushing south through the Gulf Coast states Sunday, delivering one more round of scattered showers and thunderstorms before allowing a drier, slightly less oppressive air mass to filter into the region by Monday and Tuesday.
Fox 10 Mobile reports that afternoon temperatures across the Gulf Coast will reach the upper 80s to lower 90s, with the heaviest storm coverage expected east of Interstate 65 where deeper tropical moisture remains entrenched.
Cities from Biloxi and Mobile east through Pensacola and Tallahassee face isolated severe potential — mainly gusty winds, frequent lightning, and brief torrential downpours capable of localized flooding. Areas farther west, from southeast Mississippi through metropolitan New Orleans, should see lower storm coverage as slightly drier air begins to undercut the moisture feed.
Overnight, storm activity will diminish as the front slides through, and by Monday morning much of the region will notice noticeably lower humidity — welcome but temporary relief before summer patterns reassert themselves mid-week.
Sources: Fox 10 Mobile · NWS Mobile/Pensacola · NWS New Orleans
Midwest
Sunday Storm Threat Shifts Into the Ohio Valley — Pittsburgh, Buffalo, and Syracuse Face Flash Flood Risk Through Evening
The multi-day severe weather and flooding event that has battered the Upper Midwest, Ohio Valley, and mid-Mississippi Valley through the week is not finished as Sunday begins.
Fox Weather is tracking a level 2 of 4 flash flood risk in effect Sunday for eastern Ohio, western Pennsylvania, and western New York — a corridor that includes Pittsburgh, Buffalo, and Syracuse — as slow-moving storm clusters may repeatedly track over the same saturated areas through the afternoon and evening hours.
Widespread rainfall totals of one to two inches are expected across Ohio and Pennsylvania through Sunday, with localized totals exceeding two to three inches in the most active storm corridors. The WPC notes that ensemble rainfall probabilities for excessive totals remain elevated given how thoroughly waterlogged the region's soils have become over the past week. Cleveland and the greater Lake Erie shoreline face the most sustained threat as the low-pressure system slowly tracks northeast.
Elsewhere, Chicago and the upper Midwest see drier conditions develop behind the departing front, offering a welcome break before the pattern reloads by midweek.
Sources: NWS Weather Prediction Center · Fox Weather · NWS Cleveland
Texas & Oklahoma
DFW Warms Back to the Upper 90s Sunday Under Sunshine — Triple-Digit Heat Returns to All of Texas by Monday
The brief frontal reprieve that knocked North Texas temperatures into the upper 90s and briefly lower on Saturday is already fading as Sunday's sun warms the region back toward seasonal norms.
The NWS Fort Worth office forecasts a high near 99°F for the Dallas–Fort Worth Metroplex Sunday afternoon under abundant sunshine, with a light north-northwest wind providing only marginal comfort. Lower humidity compared to the pre-frontal airmass will keep heat index values close to the actual air temperature — a relative silver lining.
The brief respite is ending fast: KOSA First Alert 7 out of West Texas is already warning that widespread triple-digit heat returns Monday and Tuesday across virtually all of the state, with Midland and Odessa expected to hit 97°F or above even Sunday under the clearing skies.
Wildfire smoke drifting south from Oregon's historic fire season may continue to produce hazy skies and elevated fine particle concentrations across parts of North Texas through early next week.
Central and South Texas remain hot and mainly dry Sunday, with the next meaningful rain chance still days away.
Sources: NWS Fort Worth/Dallas · KOSA First Alert 7 · Texas Storm Chasers
Mountain West
Dangerous Heat and Extreme Fire Weather Continue Across the Rockies and High Plains — Wyoming Under Heat Advisory
The same powerful upper-level ridge that drove record-level heat across the Mountain West Saturday is slow to depart Sunday, with the Cowboy State Daily reporting that heat advisories remain in effect across much of Wyoming as highs range from the upper 80s near the higher elevations to 105°F in the lower basins.
Casper is expected to reach near 102°F Sunday with wind gusts up to 20 mph, while Lander faces a Red Flag Fire Warning running through 9 PM alongside single-digit relative humidity and widespread smoke — conditions that fire behavior analysts call extreme.
Colorado's Front Range from Denver through Colorado Springs will also reach triple digits or close to it, while Billings, Montana, remains under a heat advisory. Afternoon thunderstorms may fire over the higher terrain of eastern Montana and spill onto the western High Plains, but with bone-dry fuels and erratic outflow winds, storm development near ongoing fire complexes is more a threat multiplier than a relief.
AccuWeather warns that as Pacific winds strengthen across the interior West on Sunday, existing contained fires could jump control lines.
Sources: Cowboy State Daily · AccuWeather · NWS Storm Prediction Center
Desert Southwest
Heat Dome Lingers Over the Four Corners — Las Vegas Forecast Near 115°F, Phoenix Remains in Extreme Heat Warning
Sunday brings no meaningful relief to the Desert Southwest as the heat dome that made Saturday one of the most dangerous heat days on record for the region refuses to budge.
The NWS issued a forecast of 115°F for Las Vegas on Saturday — the hottest reading of the year — and Sunday's numbers will be nearly identical, with the upper-level ridge remaining locked over the Four Corners region.
Phoenix faces another day at or above 115°F with morning lows expected to hold in the low-to-mid 90s, giving residents almost no overnight recovery window. The AP reports that a ridge of high pressure is holding heat close to the ground from Arizona to Montana, with relief expected to be relatively short-lived — a Pacific cold front is forecast to begin weakening the ridge across the Northwest early next week, but the Desert Southwest will likely remain in extreme heat territory through at least mid-week.
Active monsoon moisture continues to produce afternoon and evening thunderstorms across the Mogollon Rim, central New Mexico mountains, and the higher terrain of southern Arizona, generating dangerous flash flooding at altitude while the valley floors bake. Heat-related illness risk remains critical across the entire region.
Sources: NWS Las Vegas · NWS Phoenix · AP · AccuWeather
California
Heat Wave Begins to Ease Slightly Along the Coast — Interior Valleys Still Near 105°F as Smoke Degrades Air Quality Statewide
California sees the first hint of moderation in Sunday's heat wave as a modest marine push begins to nudge back onshore flow along the coast, keeping Los Angeles and the Bay Area beaches in the mid-80s to low 90s — still well above normal for this time of year but a step down from Saturday's peaks.
The Central Valley from Redding to Bakersfield remains brutal, with Fresno, Stockton, and the broader interior forecast to reach 103 to 108°F under clear skies. Extreme Heat Warnings and Heat Advisories remain in effect for the majority of the state's population.
Wildfire smoke pouring south from Oregon's historic 2026 fire season — which has now consumed more than 1.7 million acres — continues to degrade air quality across Northern California and the Sierra Nevada foothills, with AQI readings in the Unhealthy to Very Unhealthy range across much of the northern third of the state.
The high surf advisory tied to Tropical Storm Genevieve's swell has largely expired for Southern California beaches, but rip currents remain active from Long Beach through Ventura County. Cooling centers across the state remain open and at capacity.
Sources: NWS Los Angeles · NWS Sacramento · NOAA · AP
Pacific Northwest
Oregon's 2026 Fire Season Crosses 1.7 Million Acres — Strengthening Sunday Winds Threaten to Push Multiple Fires Across Control Lines
Oregon's catastrophic 2026 wildfire season reached a new milestone Sunday as the seasonal total surpassed 1.7 million acres burned — more than 88% of the all-time state record of 1.93 million acres set during the devastating 2024 season.
As of August 1, the IQAir wildfire monitoring service tracked the Rowe Creek Complex in Wheeler County at more than 313,000 acres with only 57% containment, while the Shingle Fire — now confirmed at 66,299 acres and only 10% contained as of Sunday morning — continues to challenge crews operating under National Preparedness Level 5 conditions.
AccuWeather warns that strengthening Pacific winds spreading across the interior West on Sunday dramatically increase the risk of erratic, fast-moving fire behavior, with existing contained fires at risk of jumping control lines.
Red Flag Warnings blanket much of Oregon and Washington, with 90°F temperatures and single-digit humidity combining with gusts above 25 to 30 mph.
The Trump administration has denied federal firefighting assistance grants for two of the season's most significant fires despite approvals for others requested by Gov. Kotek.
Oregon's massive smoke plume continues to blanket areas from the Pacific Northwest east to the northern High Plains and as far south as Texas.
Sources: IQAir · FireRisk.ai · AccuWeather · AP · Yahoo News/KGW