Ukrainian meteorologists predict a return of intense heat and severe weather across the country on Tuesday, Aug. 18 [1].

The sudden surge in temperature combined with atmospheric instability poses risks to public health and infrastructure, especially in the south and east where heat will be most acute.

Synoptic services said that temperatures will climb to 38°C, with some areas potentially reaching 40°C [1]. This heatwave is driven by a seasonal high-pressure system that is pushing summer temperatures back into the region [1].

While the south and east will experience the highest temperatures, the west is expected to remain relatively cooler [1]. However, the heat will not arrive alone. Meteorologists said that the atmospheric instability will generate widespread thunderstorms [1].

These storms are expected to bring heavy rain, hail, and squalls to various regions [1]. The combination of extreme heat and sudden, violent weather patterns often creates hazardous conditions for travel and agriculture.

Residents are advised to prepare for these rapid shifts in weather. The forecast indicates that the transition from high heat to storm activity may occur quickly as the high-pressure system interacts with unstable air masses [1].

Temperatures will climb to 38°C, with some areas potentially reaching 40°C.

The convergence of a high-pressure heat system and atmospheric instability suggests a volatile weather pattern for Ukraine. When temperatures reach 40°C and are immediately followed by squalls and hail, the risk of flash flooding and heat-related illness increases, placing additional strain on emergency services and the power grid.