It's definitely more than just weather talk - an "exceptionally serious" drought means water companies are genuinely stressed about supply, so restrictions on things like garden watering and car washing are pretty likely if it doesn't improve. You might see hosepipe bans come in, which is annoying but manageable for most people; the real concern is if it drags on and affects drinking water quality or availability in certain areas. Keep an eye on your local water company's announcements rather than panicking now, but yeah, it's worth being mindful about water use at home - shorter showers, fixing leaks promptly, that kind of thing. The impact depends a lot on where exactly you are in England and how long the dry spell lasts.