The world's hottest rain fell in a small California city last month.

According to weather expert, Jeff Masters, the 119-degree rain fell on July 24 in Imperial, California.

'July 24, 2018 was one of the hottest days in California history, as a searing heat wave of rare intensity, even for the Desert Southwest, sent temperatures soaring to near-record levels,' Masters wrote on his blog Weather Underground.

The world's hottest rain fell in a small California city last month. According to weather expert, Jeff Masters, the 119-degree rain fell on July 24 in Imperial, California (pictured)

According to Masters, Imperial topped out at 121 degrees F, their hottest day since 124 degrees F was measured on July 28, 1995

According to Masters, Death Valley hit 127 degrees Fahrenheit, just 2 degrees short of tying the all-time world record for hottest reliably recorded temperature.

Palm Springs reached 122 degrees F, which was one degree short of tying its all-time record and Imperial topped out at 121 degrees F, their hottest day since 124 degrees F was measured on July 28, 1995, Masters said.

Masters explained that it's rare to get rain when the temperature rises above 100 degrees because 'heat of that intensity is usually accompanied by a high pressure system with sinking air, which discourages clouds and rainfall'.

Last month's record-breaking rainfall in Imperial was due to a 'flow of moisture coming from the southeast caused by the Southwest US monsoon', Masters wrote.

According to weather expert, Jeff Berardelli, the historic temperature in Imperial signifies 'that not only is Earth getting hotter but also more humid. And that is the link between a changing climate and health'.

Imperial has a population of 17,000 and is located in Southern California.