Temperatures across the UAE will reach the mid-40s on Friday, with maximums of 42°C in Dubai and Abu Dhabi.
Along the coast and islands the maximum is likely to be 42°C with 80 per cent humidity, and the mountains are expected to hit 37°C with 60 per cent humidity.
The interior is expected to reach 45°C with up to 75 per cent humidity.
The National Centre of Meteorology said Friday would be fair to partly cloudy and hazy, with a chance of convective rainclouds forming by afternoon.
There will be light to moderate winds, freshening at times and causing dust to blow.
Conditions will be slight to moderate in the Arabian Gulf, and slight in the Oman Sea.