The cooling systems at Bedford South Wing Hospital could not keep the scanners safe, trust says.
The trust declares a critical incident.
The Trust's chief operating officer has apologised and patients are being offered new appointments.
Extreme weather breaks MRI scanners and cooling units and workload rises for sleep-deprived staff on sweltering wards ...
A heat-related critical incident has forced the cancellation of hundreds of patient appointments at Norfolk and Norwich University Hospital.
Several NHS hospitals declared critical incidents after extreme heat disrupted MRI scanners, cancer treatment machines and IT systems, forcing trusts to reorganise services as temperatures climbed ...