People play cricket on a lone patch of green grass surrounded by parched land at Victoria Park in east LondonA fourth heatwave is expected to hit the UK as wildfires tear through parts of the country. North Wales and the Upper Severn became the first part of the UK to declare drought status on Thursday, and parts of Exeter, Devon and Usk in Wales met their heatwave thresholds for 20 consecutive days. Yellow alerts for the East Midlands, East of England, London, South East, South West and West Midlands are in place until 9am on Sunday. But the heat will climb again at start of the week, with Monday’s high forecast at 27C in the South East, just below the area’s heatwave threshold of 28C. Heatwave thresholds will start to be topped the following day, with highs of more than 30C expected until Thursday in the South East.