Northern Vietnam faces rain, humidity as Southern regions endure intense heat
Southern region braces for less unseasonable rain, intense heat
Central region to continue to endure intense heat until end of May
High temperature of 45 degrees Celsius forecasted in some areas
Northern region transitions into scorching heat after prolonged rainy days
Central region: Hottest nationwide at 40-41 degrees Celsius
Intense heat remains across country
Central, Southern regions to suffer more intense heat
