A nationwide heatwave is impacting Vietnam today, June 21st, with temperatures expected to reach nearly 40 degrees Celsius. The intense heat is affecting the entire country, prompting concerns for public health and potential strain on energy resources. Authorities have not yet issued specific warnings, but residents are advised to take precautions against heatstroke and dehydration. The high temperatures are expected to persist throughout the day, with little relief anticipated. This heatwave follows a period of increasingly warm weather across the region. No details regarding the cause of the heatwave were provided in the initial report.