. H .) ▁Within ▁just ▁one ▁day , ▁only ▁nuclear ▁power ▁plants ▁remain ▁oper ational . ▁The ▁permanent ▁loss ▁of ▁power ▁reaches ▁the ▁nuclear ▁power ▁plants . ▁Comput ers ▁shut ▁off ▁the ▁react ors ▁and ▁stop ▁the ▁re actions ▁inside , ▁but ▁the ▁nuclear ▁power ▁plants ▁could ▁cause ▁a ▁potential ▁cat ast rop he . ▁ ▁( 6 ▁hours ▁A . H .) ▁The ▁last ▁power ▁plants ▁in ▁Europe ▁fail , ▁and ▁the ▁last ▁houses ▁go ▁dark ▁as ▁lights ▁fail . ▁Chem ical ▁plants ▁now ▁have ▁no ▁power . ▁Many ▁stored ▁g ases ▁require ▁electric ity ▁to ▁be ▁cold ▁enough ▁to ▁stay ▁in ▁liquid ▁form . ▁Gas ▁storage ▁t anks ▁heat ▁up ▁until ▁pressure ▁release ▁val ves ▁are ▁activ ated , ▁sending ▁to xic ▁g ases ▁into ▁the ▁surrounding ▁environment . ▁H undred s ▁of ▁thousands ▁of ▁vent ing ▁t anks ▁cause ▁many ▁animals ▁in ▁the ▁affected ▁regions ▁to ▁die ▁of ▁suff ocation . ▁ ▁( 1 – 2 ▁days ▁A . H .) ▁H ouses ▁and ▁apart ments ▁are ▁still ▁inhab ited ▁by ▁family ▁p ets ▁The ▁domestic ▁animals ▁are ▁getting ▁hun gry . ▁Ch ained ▁dogs ▁try ▁to ▁get ▁free . ▁C ats ▁and ▁dogs ▁ra id ▁re fr iger ators ▁and ▁cup boards ▁for ▁food ▁and ▁drink ▁water ▁from ▁to ile ts . ▁The ▁global ▁power ▁loss ▁reaches ▁the ▁world ' s ▁zo os ▁and ▁saf ari ▁par ks , ▁and ▁star ving ▁animals ▁test ▁the ▁f ences . ▁Without ▁electric ▁f encing ▁to ▁contain ▁them , ▁pred ators ▁escape