Heat is a source of warmth

Essential to sustain life

A wave is a friendly gesture

A universal social greeting

When you combine them

They are no longer friendly

Nor are they essential

A heat wave is unbearable

Its a natural disaster 

A long period of very high temperatures

Combined with high humidity

Can cause dehydration and heat stroke

We are in one now

The heat index is 102F (39C)

Too hot and too humid to be outside

Unless you can chill in a pool

Thunder is an explosion of lightening

At a distance it can be a rumble

Close by a crackling ear shattering roar

A storm is a violent atmospheric disturbance

Usually with strong winds and heavy rain

We await an approaching storm

To chill the blistering hot air

And soak the scorched earth

Its only when in a heat wave

That you wish for a welcome thunderstorm

Bring it on