We speak to Peter Thorne, a climate change professor at Maynooth University and a coordinating lead author with the Intergovernmental Panel on Climate Change, to examine what was different about Ireland's recent hot spell, and what it signals for the years ahead. What type of temperatures could we experience, how frequent will they become, and is Irish infrastructure prepared for it? Also, how quickly could we turn the tide if effective action was taken on global emissions?The Explainer is brought to you by The Journal. Providing open access to valuable journalism in Ireland has been the aim of The Journal for a decade. You can contribute to ensure we can keep questioning, investigating, debunking, explaining and informing at www.thejournal.ie/contribute/