Temperatures in the UAE surged as high as 51.4 degrees Celsius on Sunday, the National Centre for Meteorology and Seismology said.
The sweltering 51.4 degrees was recorded at Minhad Airport, an inland military base, UAE daily Khaleej Times reported on Monday.
A spokesperson for the National Centre for Meteorology and Seismology told the newspaper Abu Dhabi reached 48.3 degrees on Sunday - its hottest this year, while in Jebel Ali, temperatures hit 49 degrees.
Dubai International Airport meteorology equipment recorded 46.7 degrees and Sharjah 48.5 degrees, the spokesperson said.
The spokesperson said Dubai's highest temperature ever, recorded on August 9, and August 15 in 1999, was 47.5 degrees.
Meanwhile, the centre is forecasting temperatures of about 45 degrees on Monday and Tuesday in Dubai, with Abu Dhabi likely to hit 47 degrees and Al Ain predicted to reach 48 degrees.