A status yellow thunderstorm warning is now in place across the Northern Sound region.
Met Éireann issued the warning for Donegal, Cavan, Monaghan, Tipperary, Clare, parts of Leinster and all of Connacht.
Meanwhile the entire country remains under a yellow high temperature advisory.
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A couple of hundred homes and businesses are without power after intense thunder and lightning hit last night.
However, it was revealed this morning that Ireland is now experiencing a heatwave.
Cathal Nolan from Ireland's Weather Channel broke the news this morning.
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Speaking on the Joe Finnegan Show this morning, he explained how it occurred.
