A sinkhole has prompted the evacuation of about 30 homes in Nant Morlais, Merthyr Tydfil, after a culvert collapsed, likely due to heavy rainfall from Storm Bert. Local authorities, including South Wales Police and South Wales Fire and Rescue Service, are managing the situation as residents express fears for their homes. One resident reported hearing rumbling noises before the sinkhole appeared, describing the situation as frightening and unprecedented.