South Korea has experienced a record-breaking streak of ‘tropical nights’, while Japan saw its hottest day on record on Thursday

Authorities in Japan and South Korea have urged people to take precautions to prevent heatstroke, as the region reels from record-breaking temperatures and pressure on hospitals.

On Thursday, South Korea’s meteorological office said the country had experienced a record-breaking streak of “tropical nights” for 22 consecutive days this month.

A day earlier, Japan saw its hottest day on record, with the mercury reaching 41.2C, as hospitals across the country were inundated with people who had fallen ill as a result of the heatwave.

Overnight temperatures in Seoul stayed above 25C for 22 consecutive days in July, meteorological officials said – the longest period since modern weather records were first kept in 1907.