Winds of Anger

[Achebe]

Some improvement in rhythm and imagery can be achieved by minor rearrangement and editing.
Example below.
But the metaphor is still all over the place. A desert, and then a poisoned oasis? What's the connection? I mean, the literal connection?

 
Hot winds of anger
blow across the land
leaving a desert
where flowers once grew
 and mighty oaks
sung in by songbirds
are gone, like the lilies.

Where no eagles soar
parched desert bones
of the errant nomads
ring the waters
of a poisoned oasis.
Traveller, beware.
Drink not too deeply.
What's sweet on the tongue
will sour in the belly.