Today when I was watering my plants.. I noticed certain amounts of cracks which was running all over the length.. At some places it was rather a large gash. When checked immediately with my husband.. we found out it was over all the walls , the tank holder and the headroom ceiling and stairs room too... Ours is an independent home.. I am afraid it happened due to recent lightning and thunder.. I am deeply disturbed about the safety of my family and worried deeply with the thought of whole house falling down.. Coz the cracks are worse.. can we repair the cracks.. I am really worried. How to repair the cracks.. Or what is the remedy? Please help us

You may have to contact some contractors for their opinion and estimates. Thunder would not do it but a lightning strike could. Do all appliances work properly? Are there new cracks in your foundation or basement?

"the tank holder and the headroom ceiling". Where are you located, these are not common USA terms?