The UAE is braced for a bout of rainfall on Sunday - with the prospect of thunder and lightning to come later in the week. The National Meteorogical Centre forecast a spell of unstable weather in the Emirates. Experts predicted dusty and cloudy conditions on the first day of the new week, with a chance of rain. They said the country could be hit by thunder and lightning on Wednesday and Thursday. Residents were urged to exercise caution if driving during periods of rainfall. Dubai was hit by a spectacular lightning and rain storm three weeks ago, causing flash flooding within minutes. The sky flashed continuously for almost an hour, punctuated by cracks of thunder. Hail followed and streets quickly filled up with water, in a repeat of the heavy flooding in late January. Another deluge followed over night.