It really depends on what kind of "disaster" happens.
Possible trouble:
A repeat of the Carrington Event of 1859, when the Earth was hit by an enormous solar flare or CME. Back then the damage was limited mostly to disruption of the telegraph system, but today the damage could be crippling:
https://www.thunderbolts.info/wp/2013/0 ... pace-news/
A super Carrington Event could be an extinction threat. Remember in the Electric Universe all stars are variable stars, depending upon the electric state of their galactic environment. A change in that condition could cause changes in the appearance and output of the Sun causing distress for inhabitants of Earth; up to and including extinction of all life on Earth.
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Of course there is always the potential for something similar to the Tunguska event of 1908. Fortunately it happened in one of the most remote areas of the Earth. Depending on what area (city, the ocean/tidal waves etc) of the Earth was on the business end of this type of event it could result in the death of millions.
http://www.thunderbolts.info/tpod/2006/ ... nguska.htm
http://www.thunderbolts.info/tpod/2006/ ... guska2.htm
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Related to the above, is the Great Chicago Fire of 1871. Forget about Mrs. O'Leary's cow, the case for an extraterrestrial (comet) cause is very convincing.
http://www.thunderbolts.info/tpod/2006/ ... gofire.htm
http://www.thunderbolts.info/tpod/2006/ ... 7biela.htm
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The theory of Panspermia is usually put forth in the context of the origin of life on Earth; that is planets are seeded by comets, meteors, dust, etc. containing microorganisms, but then there is the possibility of disruption of the Earth's biosphere by extraterrestrial microorganisms pathogenic to humans or other of Earth's life arriving from space, causing a pandemic.
https://en.wikipedia.org/wiki/Panspermia
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The Saturn Theory (Talbott, Cardona, Cochrane, et al) is that the planet we know as Saturn is the remnant of a brown dwarf star which was captured by the Sun and wreaked havoc on the order of the solar system. if an event like this were to happen again it would truly be a disaster (dis-aster = bad star).
In
Worlds In Collision (1950) p373, Velikovsky wrote concerning the prospects for future catastrophic events:
A large comet arriving from interstellar spaces may run into one of the planets and push it from its orbit; then chaos may start anew. Also, some dark star, like Jupiter or Saturn, may be in the path of the sun, and may be attracted to the Sun and cause havoc in it
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"We have met the enemy and he is us." Walt Kelly
The order of the solar system is presently stable. Without some sort of disruption it is assumed that the stability will continue. We should enjoy the potential for peace and prosperity in our solar system. But the present danger comes from the self destructive actions of the human race. Why is that? It has been observed by psychologists that patients exposed to some physical or psychological trauma often repress the memories (amnesia) of the original trauma. They then behave, sometimes in an irrational manner, seeking to repeat and recreate the original cause of their trauma. They are struggling to remember.
Given the catastrophes and near extinction that our ancestors faced is it any surprise that humankind has devised all sorts of weapons that could repeat the original catastrophic events? Nuclear bombs on ICBM's threaten, like the sword of Damocles, to bring destruction from the sky.
see:
CULTURAL AMNESIA: The Submergence of Terrifying Events in the Racial Memory
and their Later Emergence