London authorities and health commentators warn that a severe heatwave could bring temperatures close to 40C, raising health risks for residents. Multiple reports note that commuting may increase exposure because people can spend longer periods outdoors or in poorly ventilated transport and workplaces. The guidance focuses not only on the heat itself but also on factors that can make individuals more vulnerable during extreme temperatures. These include lower ability to cool homes, financial pressures that can limit access to cooling or healthier living conditions, and higher rates of housing overcrowding and poverty. The reports stress that the combination of extreme heat and these social conditions can heighten the likelihood of heat-related illness. While the exact timing and duration of the hottest period depends on weather forecasts, the overall message is that residents should take precautions as conditions worsen and that support may be needed for those at greater risk. The coverage reflects concern that heatwave impacts are not evenly distributed across London’s population.