The high level answer is most often within 24 to 48 hours. There are a number of variables that can impact the speed of deployment, however.
First is planning. Physical risk management best practice dictates pro-active planning. MADI is a strong proponent of Security/Protection Audits to aid in the reduction or elimination of physical threats and vulnerabilities at your facilities.
An additional benefit of the Audit is the ability if gives you to select readiness levels for deployment based on your risk tolerance should a planned or unplanned event such as a natural disaster occur. The higher the readiness, the faster the deployment.
MADI also has the ability to mobilize quickly without advance planning, but deployment can be subject to outside circumstances which may affect the speed of deployment process.