Northern Vietnam Braces for Torrential Rain and Severe Thunderstorms Amidst Extreme Weather Warnings

The National Center for Hydro-Meteorological Forecasting has issued urgent warnings for severe weather across northern Vietnam, predicting heavy rainfall and intense thunderstorms from July 23rd to July 25th. The forecast indicates a significant escalation in precipitation, with rainfall intensity expected to peak in the coming days, raising concerns about potential flash floods, landslides, and localized flooding, particularly in low-lying areas.

Intensifying Rainfall and Thunderstorm Activity

On July 23rd, the northern regions experienced widespread moderate to heavy rainfall, with some areas reporting hailstones ranging from 10-20mm in diameter. Certain localities even recorded hailstones exceeding 60mm, with the heaviest downpours concentrated during the morning and early afternoon.

The situation is projected to worsen considerably. From the afternoon of July 23rd through July 24th, the forecast indicates a substantial increase in rainfall intensity across the entire northern region, leading to widespread heavy downpours. Rainfall is now expected to range from 30-100mm, with isolated areas potentially experiencing rainfall exceeding 200mm. This period is identified as the most critical for severe weather in the upcoming forecast.

Specific areas like the mountainous and midland regions of the North, along with Quang Ninh province, are anticipated to receive between 50-100mm of rain, with some locations potentially seeing over 200mm. Coastal areas in the North are expected to receive slightly less, with rainfall varying from 30-70mm, and isolated instances reaching over 150mm. The meteorological agency has cautioned about the possibility of rainfall exceeding 100mm within a three-hour window, underscoring the immediate threat of extreme weather events.

The downpour is expected to continue into July 24th and 25th, with moderate to heavy rainfall and hailstorms continuing across the North. Rainfall amounts are projected to range from 20-50mm, with some areas experiencing hailstones larger than 100mm.

Focus on Hanoi and Surrounding Areas

Hanoi, the nation’s capital, experienced cloudy skies and scattered showers on July 23rd, with a notable increase in rainfall intensity during the afternoon and evening. Temperatures in Hanoi are expected to decrease compared to previous days, offering some respite from the heat. The highest temperature recorded is forecast to be between 32-34 degrees Celsius, with clearer skies anticipated.

However, from July 23rd to 25th, a strong high-pressure system moving from the west is expected to influence Hanoi and surrounding areas, bringing continued scattered showers and intermittent heavy rainfall, particularly in the afternoons and evenings.

The meteorological agency has reiterated its warnings, emphasizing that the heavy rainfall poses a significant risk of flash floods and landslides, especially in mountainous and hilly terrain. Large hailstones could also lead to rapid inundation in low-lying areas.

Broader Weather Patterns and Regional Variations

Beyond the North, other regions are experiencing diverse weather patterns. From July 23rd to 25th, the central provinces from Quang Ngai to Dak Lak, including parts of the Central Highlands, are forecast to experience hot weather with temperatures ranging from 35-37 degrees Celsius, and potentially exceeding 38 degrees Celsius in some localized areas. Humidity levels are expected to be relatively low, between 50-55% in the mornings.

On July 24th, the heat in the Central region is predicted to intensify. The meteorological agency has warned that the combination of high temperatures and low humidity significantly increases the risk of fires and drought. Temperatures in outdoor areas are expected to be 2-4 degrees Celsius higher than the forecast, with even higher temperatures anticipated in densely populated areas and near industrial zones.

Detailed Weather Forecast for July 23, 2026

Hanoi

• Weather: Cloudy with scattered showers. Hailstones are possible, with larger hailstones concentrated in the afternoon and evening. Light winds are expected. During showers, there is a possibility of lightning and strong gusts of wind.
• Temperature: Low: 25-27°C. High: 32-34°C.

Northern Vietnam

• Weather: Cloudy with scattered showers. Hailstones are possible, with larger hailstones concentrated in the afternoon and evening. Light winds are expected. During showers, there is a possibility of lightning and strong gusts of wind.
• Temperature: Low: 24-27°C. In the western part of the North, temperatures may be slightly cooler, ranging from 21-24°C. High: 31-34°C, with isolated areas reaching 34°C.

Central Vietnam (North)

• Weather: Cloudy with scattered showers. Hailstones are possible, with larger hailstones concentrated in the afternoon and evening. Light winds are expected. During showers, there is a possibility of lightning and strong gusts of wind.
• Temperature: Low: 24-27°C. In mountainous areas, temperatures may drop to 23°C. High: 31-34°C.

Thanh Hoa to Hue

• Weather: Cloudy with some sunny periods. However, in the southern parts of Nghe An and Hue, sunny and hot conditions are expected, with particularly intense heat in some areas. Showers are forecast for the afternoon and evening, with hail. Winds are expected to be moderate, blowing from the southwest at level 2-3. During showers, there is a possibility of lightning, landslides, and strong gusts of wind.
• Temperature: Low: 26-29°C, with isolated areas reaching 29°C. High: 35-37°C, with southern areas potentially reaching 37°C.

Central Highlands

• Weather: Cloudy. In the northern areas, sunny and hot conditions are expected, with intense heat in some locations, and showers in the afternoon and evening. In the southern areas, sunny conditions prevail with hot weather, and showers are expected in the afternoon. Winds are expected to be moderate, blowing from the southwest at level 2-3. During showers, there is a possibility of lightning, landslides, and strong gusts of wind.
• Temperature: Low: 25-28°C. High: Northern areas 35-37°C, with isolated areas reaching 38°C. Southern areas 32-35°C.

Southern Vietnam

• Weather: Cloudy. In the northern areas, sunny and hot conditions are expected, with intense heat in some locations, and showers in the afternoon and evening. In the southern areas, sunny conditions prevail with hot weather, and showers are expected in the afternoon. Winds are expected to be moderate, blowing from the southwest at level 2-3. During showers, there is a possibility of lightning, landslides, and strong gusts of wind.
• Temperature: Low: 25-27°C. High: 32-35°C.

Ho Chi Minh City

• Weather: Cloudy with intermittent showers, particularly in the afternoon and evening. Hailstones are possible. Winds are expected to be moderate, blowing from the southwest at level 2-3. During showers, there is a possibility of lightning, landslides, and strong gusts of wind.
• Temperature: Low: 24-27°C. High: 33-34°C.

Analysis of Implications and Broader Context

The current extreme weather patterns in Vietnam are consistent with broader climatic shifts and the recurring influence of phenomena like El Niño and La Niña. While the provided forecast does not explicitly mention El Niño, past reporting has indicated that such events can exacerbate both drought conditions and intense rainfall in different regions. The convergence of severe thunderstorms, heavy rainfall, and rising temperatures presents a multifaceted challenge for disaster preparedness and response.

The National Center for Hydro-Meteorological Forecasting’s detailed daily forecasts serve as a critical tool for public safety and economic planning. The warnings about flash floods and landslides in mountainous and low-lying areas are particularly crucial, as these events can lead to significant loss of life and property damage. Agricultural sectors are also vulnerable, with heavy rains potentially damaging crops and hot weather increasing the risk of water scarcity and crop failure.

The repeated issuance of severe weather warnings underscores the increasing frequency and intensity of extreme weather events globally and in Vietnam. This necessitates ongoing investment in early warning systems, robust infrastructure to mitigate flood risks, and public education campaigns to promote preparedness and safe practices during severe weather. The interconnectedness of weather systems means that events in one region can have ripple effects elsewhere, emphasizing the need for comprehensive and coordinated disaster management strategies.

The agency’s proactive communication aims to provide residents with sufficient time to take necessary precautions, such as securing property, avoiding travel during heavy downpours, and staying informed through official channels. The detailed breakdown of regional forecasts allows individuals and local authorities to tailor their responses to specific local conditions and risks.

As Vietnam navigates these challenging weather conditions, continued vigilance and adherence to official advisories will be paramount in minimizing the impact of these extreme events. The long-term implications of climate change necessitate a sustained focus on adaptation and mitigation strategies to build resilience against future weather-related disasters.