Hackers successfully penetrated the network of a water treatment plant in Florida last week and dialed up the concentration of lye (an ingredient used in drain cleaner) by 10 times the desired level. Though detected, the attack could have posed a serious threat. Vulnerabilities like these are increasing in water, energy, industrial, chemical and electrical transmission systems. FM Global cyber risk expert Wade Chmielinski offers timely insights and advice for executives whose businesses rely on operational technology and industrial control systems.