Baltimore, Maryland – Summerlike heat is set to build quickly across Maryland, with temperatures climbing toward the 90s during the April 1–7 period as a powerful heat dome expands into the Mid-Atlantic.
According to the National Weather Service Climate Prediction Center, a strong high-pressure system is anchoring over the eastern United States, creating a heat dome that traps hot air near the ground. As air sinks beneath this system, it compresses and warms, pushing temperatures 20 to 30 degrees above normal for early April.
In Baltimore and surrounding areas, afternoon highs could approach or exceed 90°F, with cities including Annapolis, Columbia, and Hagerstown also seeing a stretch of unusually hot conditions. Overnight lows will remain elevated, offering little relief and increasing early demand for air conditioning.
The heat dome suppresses cloud development, allowing intense sunlight to heat surfaces throughout the day. This limits widespread rainfall, though isolated showers may develop along the outer edges of the system and move quickly through.
The early-season timing of this heat raises concerns, as many homes, schools, and public spaces are not yet prepared for sustained warmth. Residents should stay hydrated, avoid prolonged outdoor activity during peak afternoon hours, and check on vulnerable populations.
This heat dome is expected to persist through April 1–7, with additional advisories possible if temperatures climb higher or approach record levels across the region.
