(serious)
I disagreed with even the 1st edition Fireball.
Here is a proper Fireball, regardless of the amount of damage it does:
The young lady spoke in her gentle voice, voicing syllables and wiggling fingers long and dextrious, and the point of bright red flew from fingertip across the distance to the dank, dripping way between Inn and Rooming House.
Then there was sudden light. Night turned to day. Empty air became incadescent glory. And the glory expanded, becoming a white ball, a white ball of magic incarnate and heat beyond all imagination. The ball expanded until it filled all the street between the buildings, consuming everything and everyone standing there, their forms merging with the white light and disappearing.
Against ten thousand degree heat, human flesh and the paltry protections Man affords it were of no avail. Silk and cotton evaporated, leather flashed into white ash, and mail melted into puddles of white. Magical metal, armor and weapon alike, glowed crimson as it's own magic fought to save it from the white fury.
The dull stones of the street exploded as the water within them superheated, then stone evaporated also. The white fire was unappeased, and burned deeper, gouging a great pit out of the ground, glowing a brilliant blue-white. And everything that had rested above, carts and wagons and horses and people, were all gone as if they had never been.
Such was the incredible heat contained within that white ball that radiant heat was sent forth to scorch all within hundreds of yards. Only the female wizard herself was immune, as her magic obeyed her and would not harm it's mistress.
The Inn burned as a torch would with that heat, and the rooming house walls glowed red. Windows melted away, and the heat passed through them to ignite the people exposed within. Tankards of ale boiled, casks burned and exploded, every meal was now badly overcooked, and even the hard floorboards blackened and erupted in flames.
The Rooming House had stone walls, and it's windows were shuttered by heavy iron, but the heat made the iron glow white, and the walls were close to melting, and the interior temperature of the building rose above the kindling point. Beds and clothing smoldered and burned. Inhaled air killed those who breathed it. Nearly everyone in the front half of the building was dead or dying within seconds, while those in the back half were still waking up to the colossal disaster that was befalling.
Now the white ball rose, with the grace of a hot air balloon, turning yellow as it did so, towering above the city, throwing a hellish glare for blocks around. And for blocks around, buildings were burning, people caught in the open cried out from burns or frantically rolled to put themselves out, animals with their hair burned away screamed and squealed, and some lucky few who were shielded took avantage of the confusion to make a tidy profit.
Trees were bare of leaves, the leaves evaporated or burned away, and their branches smoldered and all the bark facing the explosion was blackened. Closer to the Fireball, trees burned with the buildings. Pools of water boiled, shrubs keeled over like they had been stabbed, paint peeled away from walls, statues shattered or deformed into new and strange shapes, and the earth itself shook with the quake of the fury of the spell.
The blast wave erupted a few seconds after the main blast, and it flattened the Inn entirely, blowing the shattered wreckage into other unfortunate residences. The front of the Rooming House was crushed, and melting stone blocks shot through walls and people alike, detonating against the rear wall, tearing holes in it ... until the now unsupported roof gave way and brought every floor down. The rear wall tried to stand, valiant and unavailing, then it too went crashing down, following the roof, a mountain of glowing stone and burning wood where a five story building had once stood. Behind this ruin, the shielded building that held the smithy still stood, it's stones reflecting dully the tower of fire in front of it.
Further out, the blast shattered windows, blew out walls, overturned carts and horses alike, knocked people and tree and warping statue alike down, racing down streets for many blocks, it's force channelled and concentrated by the narrow ways. Even hundreds of feet up in the air, birds in flight were knocked out of the sky, stunned so badly by the blast they could not recover before they hit the ground.
Finally the fireball faded to dull red, now 40 feet across and hundreds of feet high, and a great cloud of smoke and flame and debris was below it and being sucked up into it, and it's light illuminated the whole of the city, reflecting brightly off the distant windows of the palace. The blast shook those windows, thousands of feet away, and disturbed the King out of his pleasures, while guards and courtiers alike looked up, wondering what had befallen and what fate it decreed for them.
The sound of the explosion was heard for many miles in all directions, a long crackling and thundering sound in the far distance. In the city, the sound was a boom and an earthquake that shook towers and great buildings alike, informing all that the fury of magic was at hand, and magic was no mere fancy.
(If you think what I have described is some sort of nuclear level explosion, think again. The explosion at Halifax (non-nuclear) was 1 kiloton. Read in your histories and see what that explosion did to Halifax. It's effects were three orders of magnitude above what I just described (Halifax was nearly completely destroyed or severely damaged.))
Now, THIS is a proper Fireball.
Remember that, the next time your character faces that cute elven girl with the gentle warm smile, the long delicate fingers, and the robes of the wizard draping her form.