Local authorities say that 80 people died in the weather tragedy and there are no flights out of the city from Acapulco airport.
New pictures show the scale of the devastation:
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The shadow chancellor appeared to differ from his leader, who had been initially reluctant to blame the Kremlin for the ex-spy attack.
The Foreign Secretary said the Kremlin's tit-for-tat expulsion of 23 British diplomats would only impact Vladimir Putin's compatriots.
Sunday will be bitterly cold with snow for most.