[header] How to calm a cat in heat [title] Recognize that your cat is in heat. [step] Make sure that the behavior your cat is expressing actually means that she's in heat and not sick. An unspayed cat in heat will vocalize a lot, be restless, rub against people and objects, and roll around on the floor. 
If you stroke her lower back, she'll respond by raising her pelvis and shifting her tail to one side. [substeps] The normal breeding season for cats is between spring and late summer.