Weather (as a sailing instructor) is my thing. The weather systems are generated by the oceans, where the hotter southern (in the Northern hemisphere) drive rising air and low pressure. The air that rises then flows to the North and drops down over the cooler ocean further North , with another similar circulation starting north of that until you get to the pole. This year the previous record North Atlantic ocean temperature was broken in June (records are normally broken in September) by 1.5 deg Celsius. Put simply that 1.5 rise is putting much more energy into that huge body of water, and so we saw a hurricane in the Caribbean way earlier than th normal season (August to November).
More energy in weather systems mean more storms (like the thunderstorms in the UK over the last few days