Vulnerable groups, such as the elderly and those with pre-existing health conditions, are at greater risk of heat-related illness during the hot spell with a warning issued. People are also encouraged to check on neighbours and family members who may need extra support to stay cool and hydrated. "If you are going out take water with you, stay in the shade, wear sunscreen and a wide brimmed hat. Some heat sensitive systems and equipment may fail, with the potential for some power cuts and the loss of other services to some homes and businesses. For those who experience power outages, officials recommend having torches, spare batteries, and a charged mobile phone power pack ready in advance.