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Northeast
Northeast
New York City carries Monday's heat and humidity into Tuesday, with highs again pushing toward 91°F under a mostly sunny sky and a slim but real afternoon storm threat as the day's frontal boundary slides closer. Newark and the broader Tri-State area hold in the upper 80s to low 90s with dewpoints remaining oppressively high through the evening hours, when a Severe Thunderstorm Watch remains in effect for portions of the region.
The NWS Storm Prediction Center has flagged an Enhanced Risk of severe thunderstorms across portions of the upper Midwest overnight, with that activity expected to shift east through the day. Philadelphia pushes to 92°F with scattered strong to severe storms possible as a front presses in from the west — the CBS Philadelphia forecast office notes that timing will be critical, with some storms capable of becoming strong to severe. Boston, following Sunday's frontal passage, continues its more comfortable stretch well into the mid-70s.
- NYC — 91°F, mostly sunny, afternoon storm threat
- Newark — 90°F, humid, severe watch in effect
- Philadelphia — 92°F, storm threat, front approaching
- Boston — 79°F, comfortable, mostly sunny
- Hartford — 84°F, partly cloudy
- Providence — 82°F, clearing
Mid-Atlantic & East Coast
Washington climbs again toward 91°F Tuesday as the heat ridge holds on before the frontal passage expected to bring modest relief by midweek. Dewpoints remain locked in the low 70s and the feel-like temperature exceeds 100°F through the afternoon, with a slim storm chance — primarily along and ahead of the approaching front. NWS Baltimore notes humidity will ease somewhat by Wednesday as the boundary sweeps through.
Baltimore and Richmond track warm and humid, sitting in the upper 80s to near 90°F. A Severe Thunderstorm Watch covers parts of New Jersey, Delaware, and suburban Philadelphia through this evening, with storm surge advisories also in effect for tidal waterways in Kent and Sussex counties in Delaware.
- Washington — 91°F, humid, slim storm chance
- Baltimore — 90°F, warm, front approaching
- Philadelphia — 92°F, storm threat
- Richmond — 89°F, muggy
- Virginia Beach — 87°F, sea breeze
- Wilmington DE — 89°F, storm watch in effect
Florida
Miami holds near 91°F under a mostly sunny sky Tuesday, with heat index values reaching as high as 105°F through the peak afternoon hours as Atlantic high pressure continues to dominate the peninsula. The NWS Miami forecast shows only a 30 percent storm chance today — below the typical daily sea-breeze convection pace — before storm coverage ticks up again later in the week. Orlando and Tampa push to 91–92°F under thick Gulf humidity.
Tropical Storm Bertha is the dominant weather story across the region's northern tier. The NHC reports Bertha carrying maximum sustained winds of 60 mph and tracking west-northwest at just 6 mph from a position roughly 130 miles west-southwest of Panama City, Florida, as of Tuesday evening. A Tropical Storm Warning is in effect from the Alabama-Florida border westward to Morgan City, Louisiana. The Florida Panhandle is beginning to see conditions improve as the warning zone shifts westward, though storm surge of 1–3 feet and heavy rain remain possible for coastal communities.
- Miami — 91°F, mostly sunny
- Fort Lauderdale — 90°F, humid
- West Palm Beach — 91°F, slight storm chance
- Orlando — 92°F, partly cloudy
- Tampa — 91°F, sea breeze
- Naples — 90°F, humid
- Pensacola — 85°F, Bertha impacts easing
Southeast
Tropical Storm Bertha is reshaping the weather picture across the entire northern Gulf Coast on Tuesday. New Orleans and the surrounding metro area are under a Tropical Storm Warning as Bertha drifts westward, with Gov. Jeff Landry confirming that more than 90 percent of the city's major drainage pumps are operational ahead of expected heavy rain and coastal flooding. Baton Rouge, Mobile, and the Mississippi Gulf Coast are all watching Bertha closely through midweek.
Away from the storm's direct influence, Atlanta holds in the upper 80s under partly cloudy skies as scattered afternoon convection continues along the ridge. Charlotte and Raleigh sit in the mid-to-upper 80s under a warm and increasingly dry pattern, consistent with NOAA's above-normal heat outlook for the Carolinas corridor throughout August.
- New Orleans — 88°F, Tropical Storm Warning in effect
- Baton Rouge — 89°F, Bertha threat
- Mobile — 86°F, improving, Bertha impacts shifting west
- Pensacola — 85°F, easing
- Atlanta — 88°F, afternoon convection
- Charlotte — 85°F, warm and drying
Midwest
A significant severe weather setup is developing across the Upper Midwest on Tuesday, with the NWS Storm Prediction Center issuing an Enhanced Risk of severe thunderstorms across portions of South Dakota, southwest Minnesota, and northwest Iowa overnight into the early morning hours. The SPC notes a bowing MCS is capable of producing wind gusts of 75 mph or greater, with initial supercells also posing a risk for large hail. The threat shifts east toward Chicago and the Ohio Valley through the day as a nearly stationary frontal boundary lingers beneath an active west-northwest flow aloft.
Chicago is under a Slight Risk of excessive rainfall as the front pushes through — the NWS Chicago office notes additional flooding is possible on top of already saturated soils across the region. Minneapolis deals with the backside of the overnight severe weather setup, while Des Moines and Omaha sit in the mid-to-upper 80s, warm and humid. Elevated wildfire smoke from Pacific Northwest fires remains a factor across the Dakotas and Upper Plains, though NWS forecasters note the smoke is expected to stay high enough to avoid widespread surface air quality impacts.
- Chicago — 83°F, storm threat, slight excessive rainfall risk
- Minneapolis — 79°F, severe storms clearing
- Des Moines — 86°F, warm
- Omaha — 87°F, humid
- Fargo — 81°F, elevated smoke, storm threat overnight
- Sioux Falls — 82°F, severe storm risk
Texas & Oklahoma
Dallas and Fort Worth hold near 100°F Tuesday as a Heat Advisory runs from 1:00 PM to 8:00 PM CDT, with the NWS Fort Worth office noting heat index values will peak between 105–107°F through the afternoon hours. Conditions remain mostly dry and relentlessly sunny, consistent with the hot and high-pressure-dominated pattern that has locked the region in for weeks. Grass fire risk continues elevated across North and Central Texas and is expected to increase significantly by mid-to-late week as humidity drops and winds increase.
Austin and San Antonio sit in the low 100s under dry conditions, while Houston reaches near 97°F with Gulf humidity combining with the tropical moisture from Bertha to push heat index values well above 105°F. Oklahoma City and Tulsa both push toward the upper 90s under the heat dome's continued grip.
- Dallas — 100°F, heat advisory in effect
- Fort Worth — 100°F, hot, heat index 107°F
- Austin — 101°F, dry
- San Antonio — 100°F, humid
- Houston — 97°F, muggy, Bertha moisture increasing
- Oklahoma City — 98°F, hot
- Tulsa — 97°F, hot
Mountain West
Denver approaches 99–100°F again Tuesday as the western heat dome continues its stranglehold on the High Plains, with fire danger elevated across Wyoming, Colorado, and the northern Plains as low relative humidity and gusty afternoon winds persist. The WPC's 6–10 day outlook for August 11–15 favors above-normal precipitation building across the Great Basin and Intermountain West, though that relief remains several days away. Cheyenne and Casper hold near or above 100°F, extending a stretch of extreme heat that has already produced record readings across the region.
Billings and Rapid City track the upper 90s as the ridge of high pressure maintains its hold from Arizona northward into Montana. Air quality across Idaho, Montana, and Wyoming continues to deteriorate from Pacific Northwest wildfire smoke, with hazardous surface-level conditions persisting east of the Cascades through the week.
- Denver — 99°F, mostly sunny
- Colorado Springs — 95°F, dry
- Cheyenne — 100°F, fire danger
- Casper — 101°F, critical fire weather
- Billings — 97°F, smoke increasing
- Rapid City — 96°F, hot
Desert Southwest
Las Vegas holds near 112°F Tuesday as the Extreme Heat Warning that covered the region through Monday evening carries over into another brutal afternoon. Phoenix sits at 110–113°F under a relentlessly clear sky, with overnight lows that fall only to the low 90s — offering virtually no overnight recovery window before another dangerous afternoon unfolds. The Weather Channel and NWS forecast daytime highs that may touch or exceed 115°F in isolated desert locations through at least early this week, extending a stretch of record-threatening heat across the region.
Yuma, Lake Havasu, and Palm Springs track among the hottest readings in the nation. Clark County cooling stations remain open. The NWS continues to warn that heat illness can progress rapidly without intervention and urges residents to stay indoors during peak afternoon hours and check on vulnerable neighbors.
- Las Vegas — 112°F, extreme heat
- Phoenix — 111°F, dangerous
- Yuma — 113°F, very hot
- Tucson — 106°F, dry
- Palm Springs — 113°F, extreme
- Lake Havasu — 114°F, severe heat
California
The Central Valley remains under heat advisory conditions Tuesday with Fresno and Bakersfield sitting in the 104–106°F range and Redding approaching 108°F as the ridge of high pressure keeps inland temperatures well above normal. Sacramento holds near 103°F. Los Angeles, which has been under an extreme heat warning through the weekend, is seeing cooling stations remain open as above-average temperatures extend into the week.
San Francisco remains under its familiar marine layer at a cool 62–63°F — a difference of more than 40 degrees from the interior across less than 60 miles. Wildfire smoke from dozens of active blazes in Oregon and Washington continues to drift south, with shifting winds keeping the worst of surface-level smoke concentrated east of the Cascades for now, according to AccuWeather.
- Sacramento — 103°F, hot
- Fresno — 105°F, dry
- Bakersfield — 105°F, hot
- Redding — 107°F, extreme heat
- San Francisco — 63°F, marine layer
- Los Angeles (inland) — 93°F, hot
Pacific Northwest
Portland tracks near 87°F Tuesday — still hot and dry with no meaningful rain in the forecast — as fire weather conditions remain dangerous across Oregon and eastern Washington. Seattle holds in the low 80s, where AccuWeather and CNN report that westerly winds are pushing the worst of the surface-level smoke away from the I-5 corridor after a wind shift pushed it east, offering continued improvement from the hazardous conditions residents endured last week.
East of the Cascades, the situation remains severe. Multiple large fires continue to burn across eastern Washington with no rest in sight for firefighters, per the Washington Smoke Blog. The Old Trails Fire complex and associated blazes that devastated Spokane County remain active, with Washington Governor Bob Ferguson's public health emergency declaration still in force. Boise sits near 92°F with Red Flag Warnings and ongoing smoke impacts across the surrounding region.
- Portland — 87°F, dry
- Seattle — 82°F, smoke improving
- Spokane — 83°F, hazardous smoke, fires active
- Boise — 92°F, smoke / Red Flag Warning
- Eugene — 85°F, warm
- Bend — 88°F, dry
Sources: NOAA, NWS, Weather Prediction Center, Storm Prediction Center, National Hurricane Center, AccuWeather, Fox Weather, CNN Weather, Local Forecast Offices