Meanwhile, native species populations in the marsh have reached critically low levels.

Kirk was in deep shock, his vital signs critically low.

With two thousand unexpected passengers on board, food supplies were critically low.

The food arrived just as supplies in Sarajevo were reaching critically low levels.

Stocks of many precision missiles were reduced to critically low levels.

By 2000 the numbers of Atlantic salmon had dropped to critically low levels.

Soviet grain supplies were already at critically low levels.

"We were critically low on disposable diapers and things for daily operation," he said.

They were critically low on fuel and part of a larger training group that had gotten separated.

Many animals with critically low populations have lost their vital habitat.