Atlanta could top 95 degrees on Wednesday. New York City is forecast to hit 93 by Thursday. Boston, where the average high in late May hovers near 70, may see three consecutive days at or above 90. From Georgia to New England, an unusually powerful ridge of high pressure is locking in a stretch of heat that federal forecasters are calling an early-season heat wave, and it is arriving just as drought conditions across the eastern United States continue to worsen.
The Weather Prediction Center’s extended forecast discussion flags the May 19 through 23 window as the core of the event, driven by a ridge that acts like a lid over the eastern half of the country. That dome of sinking air blocks cooler systems from pushing in and allows heat to build day after day, a pattern more common in July than in mid-May.
City-by-city breakdown
In Atlanta, where average highs for this time of year run in the low 80s, afternoon temperatures are expected to push well into the 90s for several days running. The city sits near the center of the ridge, and with limited cloud cover in the forecast, heat indices could climb into the upper 90s during peak afternoon hours. The NWS forecast office in Peachtree City, Georgia, has noted the potential for near-record warmth on at least one or two days this week, though whether daily records actually fall will depend on exactly how the ridge positions itself.
New York City faces a similar surge. The NWS office in Upton, New York, projects highs in the low-to-mid 90s for the metro area by midweek. Urban heat island effects will keep overnight lows uncomfortably warm, potentially staying above 70 degrees in Manhattan and the inner boroughs. That lack of nighttime relief is what turns a hot day into a dangerous one, particularly for older residents and people in apartments without air conditioning.
Boston’s forecast may be the most striking simply because 90-degree days are rare there in May. The NWS office in Norton, Massachusetts, expects the metro area to reach the 90s, a threshold Boston typically does not cross until well into summer. Sea breezes along the immediate coast could shave a few degrees off readings at the waterfront, but inland suburbs and the urban core are likely to feel the full force of the heat.
Drought deepens under the ridge
The same high-pressure system producing the heat is also shutting off rainfall, and the East Coast was already running dry before this week began. The U.S. Drought Monitor, updated weekly, shows moderate to severe drought covering portions of the mid-Atlantic and Southeast, with abnormally dry conditions stretching into New England. Several days of 90-plus heat with little to no rain will pull moisture out of already-stressed soils, strain urban water systems, and raise wildfire risk in areas where vegetation has dried out ahead of schedule.
The Climate Prediction Center’s 6-to-10-day outlook, valid May 22 through 26, shows above-normal temperatures favored across broad sections of the eastern United States. That means the heat is unlikely to break quickly. Instead of a brief spike followed by relief, the pattern points to a sustained warm anomaly lasting well over a week for much of the region, extending the window during which drought conditions can intensify.
Agricultural impacts are a growing concern. Corn and soybean planting across the mid-Atlantic and Southeast is in its critical early stages, and prolonged heat combined with moisture deficits can stunt germination and reduce yields. Municipal water systems in drought-stressed areas may impose outdoor watering restrictions, and those announcements typically come from local utilities rather than federal agencies.
What could change
Forecasts at this range are confident about the broad pattern but still adjusting the details. Exact peak temperatures for each city shift with every model run, influenced by cloud cover timing, the precise tilt of the ridge axis, and how aggressively sea breezes moderate coastal readings. Whether Atlanta or New York breaks daily temperature records on any given day will not be clear until those days arrive.
On the drought side, isolated thunderstorms sometimes develop along the edges of a strong ridge, and even a few slow-moving storms can deliver locally heavy rain to small areas. But those storms, if they form at all, would be scattered and unpredictable, offering little broad relief. The next Drought Monitor update publishes Thursday, May 22, and will begin to capture how this week’s heat is reshaping moisture conditions across the region.
The Weather Prediction Center’s hazards outlook highlights heat as a primary concern for the eastern United States through at least the middle of next week. Small shifts in the jet stream could determine whether the most intense heat stays focused on the interior or spreads all the way to the coast, and whether southern New England’s 90-degree readings last two days or five.
Who faces the greatest risk
Multi-day heat events are consistently among the deadliest weather hazards in the United States, and the danger rises sharply when overnight temperatures stay elevated. Elderly residents, outdoor workers, people experiencing homelessness, and households without reliable air conditioning are the most vulnerable. In cities like New York and Boston, where many older buildings lack central air, the combination of daytime heat and warm nights can quickly become a medical emergency.
Local emergency management offices and public health departments in affected cities are expected to open cooling centers and issue heat advisories as the week progresses. The NWS may upgrade its messaging to excessive heat warnings if forecast confidence in the highest temperatures increases. Residents across the affected region should check their local NWS forecast for county-level details, shift outdoor work and exercise to early morning or evening, stay hydrated, and keep an eye on neighbors who may need help as the ridge tightens its grip on the East Coast.
More from Morning Overview
*This article was researched with the help of AI, with human editors creating the final content.
