These declarations were made amid a rare red warning for extreme heat and record-breaking June temperatures across the UK.
Queen Alexandra Hospital cited the failure of several chiller units supporting critical infrastructure, leading to the standing down of some planned care and appointments.
Norfolk and Norwich University Hospitals declared an incident due to cooling system failures in MRI scanners, resulting in 362 cancelled outpatient appointments.
University Hospital Southampton also cancelled planned operations and some outpatient appointments, citing significant pressure on services due to the ongoing heatwave.
