Authorities Warn of Health Risks as Fourth Heat Wave Brings Temperatures of Up to 33 Degrees Celsius. On Wednesday, the Environment Agency reported that seven areas of England are officially in drought because of a hot and dry summer. RELATED:Brazil Announces $260 Million Package to Prepare for El NiñoThe affected areas are eastern England, London, the areas north of the capital, Hampshire and the Isle of Wight, Devon and Cornwall, and western England. This week, British health authorities issued an amber heat alert for the fourth heat wave in England, where temperatures are expected to reach 33 degrees Celsius on Wednesday. The first lasted from May 22 to May 31, when temperatures in southern England reached 35 degrees Celsius, while the second occurred from June 19 to June 28, with temperatures reaching 37.7 degrees Celsius.