Weather: Heatwave hits parts of UK but Northern Ireland to get more rain
Parts of the UK will enjoy temperatures as hot as Portugal today as a "tropical continental air mass" moves into the country - although Northern Ireland can expect to be cooler and wetter.
The south east of England is expected to reach up to 24C (75.2F), nearly 10C above the UK's average temperature in May.
However, it is set to be cooler across the rest of the country, while a severe weather warning for rain has been issued in Scotland.
Northern Ireland can expect a mixture of sunny spells and blustery showers today, with a maximum temperature of 16C.
Claire Austin, a forecaster at MeteoGroup, said: "We're looking at highs of 23C (73.4F), possibly 24C (75.2F) locally, across East Anglia and London.
"Elsewhere, there is a heavy band of rain across Scotland and Northern Ireland that will slowly move south towards England and Wales. The south east should keep its sunny spells."
The outlook for tomorrow in Northern Ireland is much the same as today, although Wednesday will be dry with sunny spells.