There are international frameworks such as the Charter on Cooperation to Achieve the Coordinated Use of Space Facilities in the Event of Natural or Technological Disasters. In the event of a disaster, JAXA and overseas space agencies cooperate to provide satellite data.
Satellite data of the affected area can be acquired in a short period of about half a day to a few days.
However, this data is only provided to organizations related to disaster prevention.
It is available for purchase from Tellus Traveler.