the explosion, which took place at its Boca Chica Starbase facilities
The raptor testing stand at McGregor experienced an anomaly
Well, which is it? I'm going to trust NASASpaceflight over this article and go with it was a McGregor. No where near Starbase. And that means it will likely have no effect on IFT4 as this article says.
edit: Adding to this, the author of this article has no idea what they are talking about.
The Raptor engines that are currently undergoing testing are SpaceX’s Raptor 2 engines
So clearly nothing to do with IFT4, as Ship 29 and Booster 11 are already outfitted with their engines, non of which are Raptor 2s.
On its last flight test, IFT-3, Starship finally reached orbital velocity and it soared around Earth before crashing down into the Indian Ocean. On the next flight, SpaceX aims to perform a reentry burn, allowing Starship to perform a soft landing in the ocean.
IFT3 burned up on reentry, maybe parts of it made it to the ocean, but it was not crashing into the ocean that was the problem. IFT4 does not plan on doing a reentry burn. No one does a reentry burn from orbit. Starship uses a heat shield like every other orbital space craft. They are planning to attempt a landing burn, that is probably what they are talking about.