There's a lot of disaster-porn reporting going on with regard to India, and the media is able to use images of death, grieving relatives, hospital patients etc. that would never be acceptable when reporting on western nations. The incessant obsession with funeral pyres adds a nice apocalyptic touch to the scenes thus providing clickbait for news wires that need to compete for relevancy these days.
It is also very hard to get a picture of whether this outbreak is truly nationwide or in fact largely confined to certain specific regions, I suspect it is the latter but am happy to be proven wrong.
The actual figures of Covid deaths per million are fairly comparable with some of the harder hit parts of the western world in March/April 2020. As has been pointed out India has a huge population, people die in their hundreds of thousands every day, many of ghastly diseases that wouldn't be pretty if photographed or in conditions in hospitals that would horrify westerners but which in normal times pass unremarked.
It may of course get much worse, maybe the numbers of Covid deaths will surge to the millions that are being predicted, but I suspect not. I think it will follow a similar pattern to all the other outbreaks around the world, it will be pretty awful for a few weeks as hopelessly inadequate health and funeral systems break under the pressure and then it will ease.
The media will then move to the next disaster area, Indonesia? Nigeria? to report on in similar apocalyptic measures.
The actual numbers of infections and deaths in India are estimated to be as much as an order of magnitude (10 times) higher than officially reported. The number found by testing is barely scratching the surface, as so many can't or don't bother getting tested (they already know they're sick). Many deaths go unreported, their families simply bury or cremate them and that's as far as it goes.
The scale of the actual death going on can be imagined if you realise that they can't cremate bodies fast enough in normal cremation places and are burning them wherever they can find a spot. If the actual deaths were not significantly greater than normal then disposing of the bodies wouldn't be such a problem.
At the moment the death rate is particularly high in the area around Mumbai, Delhi, and certain other areas. What is happening in the countryside where the majority of the people live is not well known. People in villages and small towns die of "fever", their bodies get burned, and that's the end of it.
What happened was that a few months ago the Indians were patting themselves on the back over what a great job they had been doing of managing the pandemic, and they got complacent. They allowed big political rallies and religious festivals to go ahead, and these turned into massive "superspreader" events where large number of people travelled there, got infected, and then took it home with them, and spread it to more people there.
The solution is going to have to be traditional public health measures, but the federal government won't impose a national lock down. Local authorities are imposing various restrictions locally, but it's very spotty. They say full on lockdown isn't practical because the country is too poor.
They are trying to ramp up vaccinations, but they have shortages of critical imported items needed to make vaccines.
Things are going to remain dire in India for weeks to come. As to how much worse it gets will depend on how far it spreads to other areas.
You mention what the next disaster area will be, and then suggest Indonesia or Nigeria. Both of those could quite possibly see a crisis. The pandemic is far from over, and as we have seen with India is really just getting going in some parts of the world.