NHS boss Sir David Nicholson has said he will not quit as he headed to a meeting of the board which has the power to sack him over the failings at Stafford Hospital.
Sir David remained defiant when approached by ITV News' Midlands Correspondent Rupert Evelyn in Manchester.
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The storms that struck Texas and Oklahoma late on Tuesday brought tornadoes, tennis ball-sized hail and powerful winds.
Samantha Baldwin, 42, and her sons Louis Madge, nine, and Dylan Madge, six, haven't been seen for two days.
A spokesman for the UK Coastguard said it was coordinating a search operation in the Caernarfon Bay area of North Wales.